Cold crashing is about clearing the beer before moving it. You don’t have to keep it cold after transferring. If it’s a beer that needs additional conditioning, I’ll cold crash for a few days, transfer it to a keg, charge with 30-40 lbs of CO2 and then basement it until it’s ready (or I am.) After that, a week in the fridge at serving pressure, and it ready to drink.
It’s best to brew dark beer at night, because that way the darkness gets into the beer. —Bohuslav Hlavsa