Re: residing garage
You'll need a substrate to attach the vinyl siding to, which means that you're going to have to reside the garage BEFORE you reside it. Why not save yourself some time and money and just do it right the first time with a good quality siding and leave the vinyl in the crrap pile where it belongs?
Vinyl siding IS NOT water proof, nor is it water tight. It causes more damage than it prevents, and it looks good until it is taken out of the box and installed on your home, at which point it looks like utter and complete garbage. It will affect the value of your home to the negative side of things as well. It fades as badly and quickly as paint and offers little protection that other more traditional and better quality sidings offer.
Best recommendation, don't use vinyl siding.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!