Yes MB forgot to mention insulation, marvellous what you can do with a old duvet etc or build a insulated box eventually that can be taken apart when not in use
Answer to the OP I even after my many years of brewing do not have a brew fridge but use either the room or garage depending on the time of the year or most importantly to me I use specific yeasts at the room temps I have so Beoir for bitters/ales upto 21c Kveik for IPA's upto 35c and Novalager...