What do I do with a leaky roof in the middle of January?
If the leak(s) are due to water backing up behind ice dams, you may be able to keep the problem at bay and defer the roof work until summer, by addressing the ice dams and using a roof-rake to remove most of the snow. 

There are a few approaches to battling ice dams; chipping away, electric heat tape, or ice melt that is safe for your roof/siding/yard/pets... I currently have some ice-melt-filled nylon stockings draped across a problem ice dam, so that it creates a drainage channel for the melting snow I miss or can't quite reach with my roof-rake.

Don't put off the roof work for a full seasonal cycle tho, or you may find your newly remodeled bathroom drenched next winter.