I saved $1000-$2000 on this project!! Make everything in this project yourself including making the hardware too, easily!!
A list of the parts you'll need:
finger jointed 2x4 and 2x6
4" tool box casters from ... stock number 8161531
by LXG's Stuffs - "HOMEMADE
by Art Food Kitty - Kelly Eddington
by AWESMR kids / AwesomeDisneyToys
by richie roost