I'm wondering about fridge space as well and don't have the luxury of keeping my beer at the required temperature, except inside the fridge.
Next brew I want to re-pitch on trub of current one.
So I bottle & leave slurry in fermenter and place back in fermentation fridge.
New brew gets made and wort cooled down as much as possible. But it needs to cool down further, but no space to put the whole pot in the fridge, 'cause the fermenter with slurry lives there.
I can do an overnight outside chill in the hope the temp goes down to 20-22 oC (68-72 F) and transfer wort to fermenter.
Or maybe (I haven't done this before) I can try get the slurry somehow out of the fermenter into a sanitised bottle and it can go in the fridge together with the cooling down pot? Or in the 4 oC (40 F) fridge for a little while?