I've had 2 trailers for the SS:
- 8.5 x 24 V-Nose Enclosed - Just too big - towing an 8000lb trailer for a 2000 lb car. You will need to get a 8.5" wide at least - and double check the width between the wheel wells. I literally had 0.75" between each side pulling in. I also added cabinetry and fold down beds, but it was just too big for what I needed. I would suggest looking for an 8.5 x16 if you're set on an enclosed trailer.
- 8x14 Aluminum purpose-built open - Light (only 800 lbs) but with a single axle, I've been getting lots of cracks in it, both in the welds and in the spots where the C-Channels meet on the side.
SlingThings in Florida does make purpose built SS trailers and you can get options in them if you want. Expensive, but you get what you pay for.
There are some purpose built travel trailers you can get that can tow the SS too, but again, ramp angle, ramp height, and garage depth have always been the issue (and big $$$!!!)
At this point, I think I'm just going to go back to a regular flat bed car hauler. Again, have to watch for the width and ramp angle, but a couple of 2x12's x2' long will get the nose up enough for the ramp (you'll usually hit nose first, but if you can clear that, the rear will be fine).