Is your garage attached? Mine is and is always 10 degrees warmer than outside temps because it shares a common wall. 25 would not scare me at all, if so. It will take 24 hours at least for your beer to come into temp equilibrium anyway.
Cold crashing does not affect priming unless it gets below freezing temps (remember beer freezes a few degrees below 32 b/c of the alcohol). If you have star san or vodka in your airlock, no issues if the colder temps suck some in the fermenter.
Primary #1: Border Crossing Vienna #2: Empty
Secondary #1: Berry Rhubarb Wine #2: Black Currant Wine #3:Empty
Kegged: Orange Pale Ale IV, Hidden Lake Nut Brown
Bottles: 2H IPA III, Carmel Apple Cider, Spruced Winter Warmer, Surly Bender clone, Big 50 Barleywine, Framboise Lambic, Dark Belgian Strong, Kicked by a Moose Scotch Ale, Russian Imperial Stout, Sparkling Elderflower Wine, Barolo Wine, On Deck: Ice Shanty Bock