I know it wont work for doc but this is my setup. It's a trailer I bought at Costco close to 20 years ago to drag a kart around. I replaced the wood, painted it with rustoleum this spring and added a Harbor Freight wheel chock. It's presentable enough now that I should probably lock it to something - it sits on a parking pad behind garbage cans at the entrance to my driveway. I tow it with my '19 Sportwagen. A Harbor Freight ramp is used to get on/off.
It's perfect for my needs. It's light enough that I can easily move it around and has large enough tires that I don't worry about going 70mph.