New room, need advice on exhaust, CO2 and heat issues

Lets say you have a sealed room that is 8' x 8'. Inside this room are 2 sealed cabinets, 30" x 72". Inside each cabinet is 2 x 600 watt, 6" air cooled hoods. The goal is to have CO2, keep temps and smell from getting out of control.

Looking for some ideas on how to pull this off before cutting holes for exhaust. Plan was to run a portable AC in the 8x8 room, passive intakes on each cab, carbon filter to hood, hood to fan and exhaust out the ceiling of each cabinet. But I am not sure how to get the CO2 into the mix. Any advice would be appreciated.

sugar yeast and 2 liter bottle is a cheap way to do it..lasts about a week before u need to add more
if u have the money co2 generators are also available

If you can get a window a/c unit I'd go that route. I just picked up a pretty well-reviewed portable ac and the exhaust radiates a ton of heat. If you can't get the unit right next to your outlet so your exhaust run is short, I'd stay away from them.