Enclosed Car Trailer Buying Help!

I just bought a 20 by 8.5 v-nose for my 73 dart. After the car toolbox and cabinets theres not much room at all. I really wish I would have gone bigger. I have a couple pit vehicles that are next to impossible to fit in there with the car. I can't really give you any suggestions out there on where to go but bigger is definitely better in this case.