All very helpful answers so far. I should mention that with a Class A we always tow a car. The difference to me is that my tow bars allow the toad to track exactly the same as the MH. If I understand the fiver tracks like any trailer - at a different radius in turns. So it seems more caution, thus my question about filling stations etc. I'm pretty adept at maneuvering my MH with a car, I am intimidated with a fiver but the point about the ability to back up is a valid one.
The other major concern is what others stated. In any MH we had there was always the luxury of passengers using the bathroom, making food, heck my son would lay in bed and watch TV, my wife took a shower going down the road on more than one occasion. All the comforts of a rolling apartment (with necessary precautions - not looking for a flaming). Setting up in the rain is super easy in a MH, pull in, level, slides out, and plug in when the rain stops.
The main reasons for looking at a fiver is living space and budget. While a Class A is about the same price as a truck and a fiver combo (in my budget anyway) it seems financially more responsible to buy a fiver and a truck that has much more usability in every day life than a derivable RV. That truck can be used every day and be far more valuable in 10 years than a motorized RV (depreciation respective). And current state of affairs, I can get a real good deal on a truck and spend less on the fiver. No one is really slashing prices on Class A's. I should also mention that my 07 F150 with 250k miles is getting long in the tooth. It won't be long until I need a new(er) truck anyway.
If the fiver sits for weeks at a time and I am still using the truck, seems less of a concern than a more expensive motorized RV sitting - engine and all.
But our nature of travel lends itself to a Class A. Long drive days and stays of only a few days or a week at a time. More nomadic than staying put for long periods.
Ok that was a lot, brain dump.