IMO having a finished off garage is overrated anyway. It's a garage, not your living room. You park vehicles in this space that are often times dirty to one extreme or another. Many people work on their cars in this spot which means grease, oil,.... on the floor. Keeping the floor clean is a task in itself let alone worrying about the walls. Yes, a finished off garage looks nice but it's will always be very low on my list of priorities to make look nice, finished off and pristine.