i guess you would have to decide if you want to do all of your work outside or inside?. i have a 5x10 with just a shelf bolted down to hold approx 6 boats, works very well for me and tows great inbehind my v6 minivan. on the other side my buddy has a 7x16 with just about everything in it, a/c heat, generator, dc inverter with dual batterys, upper&lower cabinets, sink, and enough rack storage for 14 boats. very heavy , uses a suburban to tow with. so there is 2 opposite ends of trailer use, you have to deside whats best for you