A few other considerations;one is color. When I was looking at new trailers, it was a pretty warm summer day. When I stepped out of one white trailer, into a black trailer parked right next to it, I could not believe how much hotter the black trailer was inside. Also I have seen many black trailers in the pits on a hot day, and the outside walls were very noticably buckling. When the sun went down, the panels got straight again, but I would think that all that panel flexing can not be doing anything good sealing the panels to each other.
At the time I thought they were kinda ugly, but I have grown to really appreciate having a door in the middle on the left side. Although I normally winch the Fairmont into the trailer, it is nice to be able to fully open the drivers door with the car inside the trailer, even if only to put the trans in gear (or Park with an automatic) or set the park brake if you have one. It also helps with air circulation at the track, having both side doors , plus the rear ramp door down.
My trailer has a 20 foot awning on the right side. Nice to keep the rain off, or hopefully, the sun.
Although my trailer does not have them, but after seeing Dales, I really wish I had at least 1, preferably 2, covered, in floor storage bins. Handy to get the trailer spare tire out of the way, plus room for a lot of other stuff, to get more useable space inside.
My trailer also has 3 12 volt ceiling lights, as well as a pair of 4 foot 120 Volt flouresent fixtures. There is a long "Shoreline" power cable that I can either run off my generator, or at home, connect to an extension cord to the house or garage. I also have 2 adjustable outside flush mounted halogen 120 Volt lights, which really lights up the right side.
Jay, what about some more info about you F150. Last week I went to my local Ford dealership, after checking out the 2018 F150s online. If you order the right combination, you can get a 2018 F150 rated to tow 11,200 pounds,with the 3.5L Eco Boost, plus the new 5.0L V8 is rated at 400 HP (supposedly can run mid to low 13sin the 1/4 stock!), with a 10 speed automatic. You can get the new F150s with the Pro Trailer Assist which basically backs up the trailer for you. Man, could I use THAT!!