Pete, I too am a solo traveler in a 2012 Funfinder 189FDS. If you look at the floorplan, you will see in this back space here next to the dinette, there is a 27" wide slot that is perfect for a chair. I have relocated my 32" flat television set to the wall that is 7 feet in front of me. Having a chair is essential to me.
A few other small mods and upgrades ( like residential faucets for the galley and bath ) have made this work well for me.
The shower is small but usable. The galley has limited space for food preparation, but I've learned to work with it.
If you can find a clean used one, I'd recco a 2011 to 2013. In '14 and '15 they eliminated the front window. Personally I like the front window.
Towing this with a 1/2 ton would be easy. Weighs 4100 ready to go but with dry water tanks.