In thinking about an open trailer to meet my purposes, I have decided on a 7' X 14' with two axles and a side and rear gate. In looking at a dealer's inventory, I noticed that the trailers with 3500 lb axles had gates that were 4' tall. The side gates that I have seen all are 4' wide. These trailers with the 3500 lb axles all used tires with 15" rims. I have looked at a trailer in my neighborhood that is used by a lawncare contractor that has 5' tall gates and has tires that use 16" rims. I believe the axles(2) are rated 5000 lbs. Here's my questions: 1. Does anyone own a trailer with a side gate wider than 4'? Do the manufacturers customize these in size? 2. If you plan to load a trailer with 3500 lbs., is a 7' X 14' with 2 3500 lb axles good for the load? 3. If one bought a 7' X 14' with 4' tall gates, will the gates allow mowers like Z's to load and unload in the trailer?