you have to load a car nose first, otherwise it unloads the tongue of the trailer and thats dangerous when towing, it can cause the trailer to sway, tires to fail or even flip the trailer.

at minimum you need a 16 or 18 foot trailer. all enclosed car haulers are 8ft wide so you have some room to open the doors, its not a huge gap but you can get in and out of the car. unless youre fat lol.

We always size our trailers over, since we haul wheels, tools, etc and its nice to have to the extra space.

You also need a rig to tow it with. the smallest we've towed with was a ram 2500 gas truck. So so on straights, sucked going uphill.

You really need a 1 ton diesel truck to pull a loaded car hauler effectively and economically