Nice, but I'm still not putting one in.
My insulators were in this week sealing penetrations and the base plate. I just spent 5 hours air sealing top plates, corners, framing gaps, and tidying up their work with foam. I am insulating the garage. You could always have someone come in and blow in fiberglass or cellulose in the attic.They can blow it into the wall too, they would need to make holes and then patch it. Also, you could foam the garage doors if they aren't insulated.