There are two widths of enclosed trailers. Those with the sides inside of the wheels and those with the sides outboard of the wheels. It makes a big difference in what you can see in back.
One nice thing is that low weight of a 7 allows you to use a motorcycle trailer. I have a V nose all aluminum featherlight. If I were racing or doing lots of track days I would like a bigger trailer to hold all the canopies, tools, chairs... I tow with a Ford Ranger with an after market electronic brake controller and suction cup extension mirrors. A trailer mounted RF back up camera would be a very nice addition. I get 11-13 mpg towing depending on terrain. It would not work in the wester mountains. OK on the east coast.