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: Surly Bender clone #2:Berry Rhubarb Wine
Secondary #1: Empty #2: Empty #3: Empty #4: Sparkling Elderflower Wine
Kegged: Dark Side Dunkel, Irish Red
Bottles: Big 50 Barleywine, Framboise Lambic, Dark Belgian Strong, Belgian Golden Strong, Kicked by a Moose Scotch Ale, Apfelwein, Russian Imperial Stout, Barolo Wine
On Deck: Spruced Warmer, CDA