I have a 20L x 7-7.5w enclosed trailer...its tall...8' maybe???? I want to be able to haul 5-6 sleds and 100-200 gal fuel tank. I am thinking I obviously need to go up. Thinking about adding another level to the trailer to allow storage of a few extra parts, a big fuel tank to haul non ethanol fuel, and an area to hold 1-2 sleds, allowing 4 sleds on the bottom. Want to keep costs low so looking to build out of simple building materials....2x4s and plywood or osb. Thinking about making the front 10' solid with a hinge on the second 10' to act as a ramp and have it lifted by a simple pulley/cable/comealong system. Anyone ever build anything like this, any suggestions?