Before you decide to buy that stuff, I would consider just driving up sometime when you can. There are a couple guys here in DFW with bending jigs and presses, who have said they're more than happy to let folks use them. You could just buy as many flats as you think you'll need, and then make the drive and bend 'em all. Better than dropping the $250 on tools you might only use once. Heck, probably more than that. I have heard of people having $800 plus into their AK tooling.
A benefit of doing this is you get to meet some of these folks. Meet folks to shoot with, etc. Send an IM to getit, maybe there is a weekend that would work for you both, perhaps a weekend where he's already planning to do rifle stuff. I don't know that I will be able to make it tomorrow anyways, If it doesn't work out with getit, I would tell you to post up in the hometown section and ask for Austin builders who can help you out or whatever.
No real pressing need for a welder, unless you want to do a weld-build like I did. With screw or rivet builds there's no need for a welder (except a spot welder for the rails).