Thank you for putting all of this info together, you saved me a lot of searching and ~$200.
I am going to Home Depot tomorrow to start building my own. I think i might put some castors (wheels) at one end and a handle at the other so, if I had to, I could wheel it around my garage. I will post pictures and let you know if it worked.
On second thought, you might not have saved me that much money, I'll probably have to buy a skill saw tomorrow