Ugg.. experiencing same issue. My unfinished basement is pretty good for initial fermentation with spots between 45 and 50F. I've been using the stairs under the outside bilko doors for the lower temps. Now that we are seeing temps in the mid 50's outside, I've lost low temp lagering as I too do not have a spare frig/freezer either. I'm considering using the "low tech" lager James Spencer talks of on BBR. Pretty much 2 coolers, copper tubing, a temp control,pond pump, and ice jugs/water. Not sure I want to do this for the 15 gallons I have lagering now. This is giving me more incentive to remodel the basement with brewing/fermenting/lagering features. Trying to do all that in limited space and budget - maybe I'll post over to equipment section to solicit ideas.