Actually, it was a pretty good start... an M44 with a couple thousand each of russian surplus FMJ and Wolf SP's (for taking game as necessary). Max investment for rifle and ammo: 300.
Good .22 rifle for small game/pest control, with inexpensive scope, and 5.5 metric assloads of every .22lr ammo available. Max investment for rifle, ammo and scope: 300. Edit: Throw on a cheap but sturdy scope like a Russian milsurp, or a 4x shotgun scope from walmart, etc... for maybe another $75 tops.
Eastern European surplus pistol (Makarov, PA63, etc..) for defensive needs. Several mags, cheap holster, 2 or 3 cases of 9x18 Russian HP's. Max investment for pistol, mags, ammo and holster: 250.
Since we're talking about survival here, there's a good chunk of change left over for MRE's, camping needs, etc...