Max06 said:
It would be far more efficient to buy a small used walk-in. There was a 5'x5' for $2500 on FB marketplace a few weeks ago.
Appreciate the feedback but not really looking for efficiency, but rather allowing for a deer to hang for 12 hours without spoiling and as cheap as possible. Figured there was a much cheaper way to build one than buying an actual walk-in. Originally thought of a steel container box (small as possible), cut out hole for window-unit AC and then spray insulation around the AC but the steel boxes were larger than needed and pretty expensive.