On AKfiles, there's a guy names akmachinist and he makes great AK build tools for half the price of AKB. I got long and short rivet jig, barrel removal and instal kit and trigger guard jig for $240 he warranties it all.
There is a member on here named Ryan in SD and he has a flat bending jig for about $80 and I have bent about 20 flats with it and they have all turned out great.
So now you are at $320 and have money to buy a press, $100
You still have enough to buy a parts kit.