We had a Road Runner 139 for many years (just like the little Fun Finder). Loved it! Coachman Viking Ultra lite appears to make 13-15' trailers with extremely similar floor plans. The Palomini has a little trailer also.
It was my experience that the little trailers are "entry level" trailers. We found the quality of the Road Runner to be poor, however my hubby is very handy and made little repairs and adjustments along the way. Nothing major ever went wrong (no soft floor, no leaking roof).
We had absolutely no trouble towing our little camper, although we did use a sway bar. We never had a problem with wind or distance. We hauled it from Minnesota to Wyoming and back (our longest trip) and it was a trooper. No problems at all.
I really like the looks of Taylor Coach. They are very small! I've not seen one in person, but I've seen favorable reviews. They are heavier, so possibly the quality of build is better.
Good luck!