We purchased a "very little used" 2008 model 19T last summer. We purchased the unit so we could return to the camping lifestyle after health reasons slowed us down several years ago. We use it for local trips in state and just for a few nights, but I would not hesitate making a two or three week trip with it at all.
To me, storage space is a minor problem, but if you travel light, it is o.k. I did not let the thought of mechanical failure of the lift system deter me, it does have a manual override. Raising and lowering takes about 30 seconds, so roadside pit stops are no problem. I never thought about drilling or mounting anything to the roof. The A/C unit, antenna and two vents take up a lot of space on the roof, the bigger units should have more roof footage than the 19 footer.
It tows very well, but I already had a F250 CC, V10 p/u, so did not notice any mpg drop or loss of power while towing...
The new Hi-Lo Mfg. Only has a 18 foot model with two floodplains, and neither have a bathroom/shower, a downer for us.
Dave & Pat
2008 Hi-Lo 19T
2004 F250, XLT Crew Cab, V10, finally, enough power!
"No kids, no pets, made it to retirement"