Which model is it? They only produced 2, the Electra, and the Wright Flyer. You say it's cheaper inside... what does that mean? It appears to be one that was to have the full-body paint but was never painted.
These were supposed to rival Airstream and were VERY expensive when they hit the market. They just didn't sell at the high price being asked, so FR stopped production at about 70 or so units, if I remember. I was very interested in one but decided I didn't want an orphan. I still think they are the coolest travel trailer ever built. If you are very handy at fixing things and have the time and tools, I say go for it... I'm still a bit tempted, myself, but not without a warranty.
J & D in Lovely Weatherford, TX
2016 Jayco White Hawk 28DSBH TT
2014 Ram 2500 Crew Cab 4X4 6.7L Cummins