Sounds like you going to be broke, unless you shoot 22lr. If you are shooting 300 rounds of 9,40,45 every day in three days thats 1k rounds which is $300ish. thats $600 weekly. Like $3000 a month in ammo ?
SHTF vs TEOTWAWKI you ask? SHTF, just some crap on the ceiling and walls, TEOTWAWKI end of the world as we know it. Orignally made by 9mm/®™©