Neat way to think outside the box. Kinda pricey though. Watch one of the videos to see how it works.
https://www.allytrailer.co.uk/2-wheel-trailers
Very slick, looks like Mini hubs, wheels and tyres?
I like that it's open down the middle so you can work off of it too when a car is loaded on.
But about the only thing you could haul with is it something as light as a Super 7 or a lightweight Mini, anything heavier and you exceed the weight limits for the trailer - and of course, no trailer brakes.
Some really clever ideas tho - I like it!
I didn't see a price? Oops, found it.....Spendy!
Justin posted a good idea a while back, look for a used trailer for offroad side by sides and such, they're aluminum too, rated plenty heavy enough for a Mini and have a folding rear ramp for less wind resistance.