I'd suggest putting out a website to sell:
*details would have to be worked on this one
(on a side note, the tag line could be: The Minutemen... doing jobs illegals don't want to do)
Sell them all for $10, with complete transparency on costs and monthly statements, and have 90% of the money go towards the efforts. I would also PROMOTE, INSURE and CONFIRM all items sold were made in the US. It'd be good if you could get advertisers involved as well.
We would also need to insure we have a number of people hired to coordinate volunteer labor and oversee normal operations. These people would be full-timers, potentially having 3 shifts of them. There is a ton of work that can be done with volunteers. It could even turn into a 'thing' where people come out on weekends or sign up for 'a tour of duty' building the fence. This would help reduce costs, drive up interest, and probably get more media coverage as Americans come from all over to help (especially some high school and college kids as summer work).
The goal is to get the fence up as fast as possible. This will require a massive number of people and will require a good amount of coordination. Is there someone managing these teams? Has anyone decided on what teams would do what? Who is controlling the schedule and watching over the resources, deliveries, personnel support and labor?
If it's worth doing, it's worth doing right.
At the Minutemen website to build the fence, you can volunteer to help.
So, if you are concerned about seeing this is done right, then volunteer and personally check all these things yourself.