Dave, those castered pallets are a great idea. I did something similar under my 46. I took four Harbor Freight wheel dollys (the kind you put one under each tire normally) strapped them together and put a pallet on top. The frame rests on that and so far hasn't fallen off, although I plan to make a better setup soon.

Steve, yep, lumber isn't priced like it used to be, however $ 36 of the hundred bucks went for the wheels and another chunk went for all new bolts and nuts. One thing I have noticed is that the quality of lumber has improved. I remember having to dig through a pallet of crooked, warped 2 x 4's to find enough semi straight ones to build something. Lately they look much better. Maybe since construction has died they aren't cutting down any tree they can to get wood and the selection is better.

Don