I custom build a much lesser, but custom sized bed slide from 2x, plywood, casters, screws, from Home Depot for $150 in material. Slides out 5' until the "stop" stops it.
Rear handle saws, long handled tools beneath. (4) 2.5 gal gas cans on the two sides, rearward of the wheel wells. Crates, rope bags, blower, Arbor Trolley/ Hand truck on top, Rakes hung from ceiling. Contractor's canopy with barn doors and side access compartmentalized tool boxes.
http://www.finehomebuilding.com/ite...-drawer-and-get-easy-access-to-all-your-tools