RE: cheap meat locker???
I was just going to use mine to store the deer in and then take them out in the main part of the garage to do the skinning. A guy I know has an older 2-door pop holder thing from like your 7-11 store and throws his deer in there, but they lay down on top of each other. I don't think that is good, I like to hang them so the blood drips out. As far as easy floor clean-up,I was thinking of throwing a bunch of sawdust/woodchips or even kitty litter down to soak up the blood. I think if you insulate the heck out of the walls and ceiling the window a/c unit would work. The only thing I worry about is the a/c unit thermostat not letting it get cold enuff or it getting to cold and freezing up.