Regarding the garage situation depending on what type of paint you're looking at (metallic, bc/cc, SS) you might be able to get away with painting it out in the driveway.
I'm contemplating painting my beast outside using a single stage paint.
That way I can put some layers on and color sand out all the bugs and what not that may have found their way into the paint.
Just make sure to check with your environmental laws, some places really frown on painting outside.
Quick question, have you ever seen this other guys work?