Why are you gonna get CO2? How hot is it getting in there? Do you have a ventilation system? The only reason I ask is that - if you are about to move anyway and that grow is small - its probably not worth getting CO2 unless you really have no ventilation whatsoever and your temps are higher than 80. Its more of a pain in the ass to try to fit more stuff into that small space than its worth. Poor college students unite!