[Trekster]

There has been some great advice. I built a 20 x 25 shop at my old house and built a 36 x 40 at my current house. If you can afford it and there is enough room, go bigger now. Also, get the biggest door you can. I've used shops that had 2 - 8 or 9 foot doors instead of a 16 or 18 foot door. You'll be happier with a taller and wider door. Good luck.