Holy Crap! He is on trial for child molestation - including his own daughter when she was just 5 or 6!
Clearly, you can’t have just anyone doing anything they want with other people’s money. You can always have a bad apple - but you still want to have a good process for getting fence built.
I am proposing having the planning, design specification, and acceptance inspection done by the responsible federal agency (much should already be done) - just allowing others to fund selective execution.
The gist is to make it a simple (turnkey), modular process, which ensures that each module will fit into a comprehensive design. Then open execution to all comers. The goal is to make fence building faster and better, and to decentralize execution to anyone willing.
For example, if a State or City faces a surge of criminality from a gang-ridden Mexican border town, they might choose to get a ten mile stretch in place by the next year. It might be cheaper for a State to pay for additional fencing than to provide extensive social services for a wave of immigrants. 10,000 immigrants at $10,000/year equals $100 million, so they might make a business case, and start a bidding war among states to divert the flow elsewhere.
If a billionaire, corporation, or industry association had key property that they wanted bypassed/protected, they could get a couple of miles blocked off.
If a segment of the population were motivated to address the situation, they could raise funds (Simcox was a bad bet, but others could be good).
Congressmen would likely get earmarks for a few miles here or there. If a new threat developed, or a significant event occurred, response could be faster.
If a variety of projects were underway, businesses would be attracted to fence building, their processes would get better, and they would work to get more miles funded.