Planning for a new shop

I just wanted everyone to know that I'm not dead! I have been working on a programming project this spring and summer which will finance my new workshop. I am thinking about a 30 x 50 foot shop - enough room for a blacksmith shop, lots of shelves, storage area, and a secure parking place for the lawn mower. I'll need to clear the site and level it to within 3 inches. I know where I will be building, but I need to get my brother's bulldozer over here before I can get much done.