Just an idea. If funding is essentially the problem I would be willing to pay a 10-15 dollar border fee. It would save more than that in gas and so much time!
Coming from Utah, San Luis is only maybe 50 miles longer. My main concern is border wait time. Are there times or days that are quicker to cross? We always tried to cross Lukeville mid week.
We’ve bought a few tools at the Segundas. Power saw, shop vacs etc. reasonably priced and good shape. There a couple on the corner A couple blocks east of Sams on BJ
I still use Proalliance. Never had to claim anything but they have always been right on top of getting the paper work. Hopefully I never need to find out if I need them!