Looking for a 5th Wheel to double tow, need advice

I would look at something without a Lippert frame. Carriage which would be used, Lifestyle, Excel, Hitchhiker which would also be used as they are not building anymore. Some of these used trailers will be better then what you are looking at new. Due to a non Lippert frame, and just built better all over. There are a few with LIppert frames that would be OK as the manufacture makes them build a better frame. DRV would be one.