Bike Rack Mount on Rear of Trailer?

I am trying to get some ideas for a bike rack mount on the back of my CT. I don't quite yet have my trailer to look at but was wondering if anyone has seen a hitch connected to the rear underside of the trailer trailer much like a class 1 drawbar type hitch on a TV with which you can connect a bike rack to.
The bike rack as it only needs to hold 2 adult sized mountain bikes so I had given some thought of crafting then mounting a rack directly to the rear barn doors. Thinking ahead though, I don't want to drill holes in and through the doors which may affect the future resale value of the CT if prospective buyers had no use for the rack.
The bike rack as it only needs to hold 2 adult sized mountain bikes so I had given some thought of crafting then mounting a rack directly to the rear barn doors. Thinking ahead though, I don't want to drill holes in and through the doors which may affect the future resale value of the CT if prospective buyers had no use for the rack.