Blue Beard...consider using white pole barn siding on the inside. No taping, sanding, painting. And the best part is when you wash the trucks inside, you don't have to keep the walls dry!! I've got it in my barn, and it's great! Bright, clean, and maintainence free!! Mines 35x58..16ft sides. 2 12x14 doors. Indirect tube heat, 100amp-240volt, running water, floor drain, roughed in for toilet, sink, and shower. Built into a hillside with 10ft high poured walls, then metal above. Sitting at $55,000 now with more to go!

Being self employed, and parking my semi truck inside makes it a business expense.