Another option...and be open minded...is a futon loveseat.
Now I know...eww futon..cheezy cr@p. But not so anymore. There are a lot of solid wood futons in what is called furniture quality build.
The love seat versions come in around 60" wide and obviously make into a bed.
We just replaced our couch with a furniture quality futon (double sized ) and everyone who sees it loves it and when I say it is a futon they are like...say whaaaaat.
Plus you have to think of ONE BIG THING. How you going to get it in to your trailer. Hmmm. This is more than just a pain...depending on your entry door and kitchen location it can be impossible.
But the futons come unassembled so no issues.
Now here is a link to an online futon store so you can see what the good quality ones look like. If by chance you go this rout then I suggest finding the model you like then also search Ebay as there are a lot of seelers on ebay and also Wayfair etc who include shipping.
Futon Planet: Winchester Loveseat Futon Package
Futon Planet: Complete Loveseat Futons - FutonPlanet.com
Futon Sets: Frames, Covers and Mattresses - Futonland