DO NOT get the Tapco folding stock. It's junk and it'll break. POS.
Get the ACE folder if you get one. TAPCO makes decent trigger groups, which you don't need for that, their pistol grip is alright, but their stock is horrible crap.
As for the magazines, Bulgarian waffles, which are pretty indestructible, are around $19 each. You can see one in the picture of mine, there. Only get a real one, which has a "10" in a circle on the side, and do not get the "civilian" ones with pictures of bullets down smooth sides...they're junk. ProMag also makes a cheap copy of the Bulgarian waffle that's a jammomatic POS, and some vendors like to pass them off as real.
Bulgarian waffle, not smooth, is the only one I like.