If you believe that the overall structure we have today, with the two parties and the current overall level of government, regulation and taxation could work well, but you think Republicans run things better than Democrats, your plan could work. What will be required will be for you to get very actively involved in the Republican party. Let me explain a bit more what you need to believe if your plan is to work:
- If you believe that the United States Government, and those in power in Washington DC should be picking winners and losers, but you believe that Republicans are better at picking "the correct" winners and losers, your plan is great.
- If you believe that government programs, and especially Federal government programs will solve all our problems, but you believe that Republicans know better how to create manage the programs to solve all our problems than Democrats, your plan is great.
- If you believe that government spending, especially Federal government spending, is around the right level (+/- say ten percent), but you believe that Republicans are better to manage the level of spending and pick the right spending priorities, your plan is great.
- If you believe that the government, especially the Federal government, should take your money and spend it "the right way" for you, instead of letting you spend it as you wish, but you think Republicans are better at figuring out "the right way" to spend your money than Democrats, your plan is great.
The Republican party today has as its primary goal, getting more Republicans elected to acquire more power and prestige for Republicans. They might pay lip service to "smaller government" and "lower taxes" and other things that sound kind of good. At the state and local level, they might even pass "10th amendment resolutions" and do things that look like they want to trim back some on government, but in the end, it's all about more Republicans wielding more power. It really sounds like your plan could call for more of that. If so, you should work within the existing party structure.
I don't believe that's the solution. In my opinion, the solution is stronger local and state governments first, and a strong commitment to the Constitution of the United States. It is especially important that everyone at all levels, from the individual voters, up through city councils, mayors, county commissions, governors and state reps, all the way up to the US Congress and the president, all must understand the limits that Article 1, Section 8 of the Constitution places on the Congress and the entire United States government. Ultimately, the 10th Amendment is where 
, along with our States (the legislatures and governments of our states) told the Federal government, “What you see in the Constitution, that's it. You can't do more than that, we are responsible for the rest.”
Our problem today is that we've forgotten that. With freedom comes responsibility. Too many people in this country are willing to take the security of slavery over the challenges of freedom.
But back to the political realities of today. The first reality is that less than 5% of the voting public choose our elected officials. I know that's much lower than General Election turnouts, but the General elections are just where we chose between the two parties. The Primaries usually have much lower turnouts, and that's where candidates are selected. That's where the action is.
If you really want to return to Constitutionally limited government, you'll find that Republicans generally aren't interested in that. This is especially true with the "Republican Leadership." The Constitution is an impediment to them achieving their primary objective, which is more power for Republicans.
You have to reach out to the grass roots, and make the small gains at the local level.
A better strategy than nailing a copy of your "Manifesto" to every Republican party county office would be, contact every voter in your precinct. Personally hand them a copy of the United States Constitution and ask them to read it. Maybe form up a local "Constitutional study group." You can get a list of all registered voters in your precinct from your county election supervisor. That information is public record. Usually, the database you get also tells party registration, and whether or not they voted in the last primary. Be aware that the primary voters are hard core partisans. They are more likely to be in line with the "leadership" of their party and will care less about actually limiting government to the Constitution and taking local (sometimes even personal) responsibility for things that shouldn't be done by the Federal government.
Then, as a local group (call it a TEA Party, a 9-12 group, a county constitutional protection convention, or whatever you might wish), start vetting candidates and finding people who will actually follow the Constitution. If you can get enough "regular people" out for the primaries, you'll overwhelm the "party leadership" and their 5% that vote in the primaries, and you can get a candidate who 1) is not a career politician, and 2) cares more about the Constitution than they do about party power and personal power.
If you read my example above, with the park renovation, you'll see that even the City Council has to pay attention to and respect the United States Constitution. It's easier to take payoffs in the form of "grant money," but that is what has destroyed our country.
That's my strategy, and the strategy of some of our local TEA Party and 9-12 groups down here in Florida. I personally have made it my goal that within the next 9 months, I will personally introduce myself to and hand a copy of the constitution to every voter in my precinct. Since I'm in Florida, and Florida actually has an oath to support the United States constitution on the application for voter registration, I will also point out that if they are a registered voter, they have already sworn to uphold and protect that document, and they should understand it and protect the ideals of our nation's founding. We are also always searching for candidates, for every position from President down to "Mosquito control officer." When primary time rolls around, we'll revisit everyone with some information about which candidates are committed to freedom and the United States Constitution, and ask for support for those candidates in the primaries. That way, there will be a choice in the General election who really does respect the Consitution of the United States. Even better if we can find on in each party to guaranty we have someone who will respect and follow the Constitution of the United States (as originallly intended by the founders).