Call me crazy..........but I'm in the middle of re-welding a Bugy milled kit with a demilled m64 receiver and m70 front stubb.
I'm planning on building it with a MIG welder, drill press, grinders/dremels, a length of threaded rod & nuts/washers to set the barrel, a BFH of course, and just other small misc tools every tinkerer should have laying around. Hopefully in a few weeks, I'll be able to tell you if it all worked.
ps. I'll be borrowing headspace guages from a neighbor - as of now, I don't plan on building any other 7.62x39 guns.
I'd have to agree with jjk308, decide what type of builds you are going to concentrate on in the future, and buy tools that will get the most use. Unless you really want to build a particular gun, $$ for tooling should be figured into your build fund. Sometimes, it just dosn't make sense to build something when you can go to a shop & buy one ready to go for less.
On the other hand, I bought & learned how to use a welder for the sole purpose of building my Thompson. Before I bought the tools, I researched what else I can do with the welder...........hence, now I've bought kits with milled receivers and will be doing a few more re-welds, not to mention the lawnmower deck, broken tools, tripod conversions for my beltfeds, etc. You should ask yourself how useful the press will be after the AK build. Do you work on your own car, etc.