I didn't read the part about you being alone most if not all the time.

Class Cs are bigger and surprisingly cheaper than class Bs for some reason. Class Bs are probably more economical....our motor home gets 6 mpg and only has a 40 gallon gas tank. With the generator running we usually have to stop every 150 miles or so....which makes getting anywhere damn near impossible LOL. The generator will run out of gas somewhere between 1/4 and 3/8s of a tank so we have to fill up at a half a tank...thus the 150 mile range. I do not know but I would bet that most class bs will push 10 or more MPG. They are more expensive though....late model low mileage class c motorhomes are plentiful and relatively inexpensive.

Its probably also easier to find parking for most class Bs. We have one in our neighborhood and the HOA has never said a word about it being in their driveway because it looks like a big van. I can't drive ours past the entrance to our neighborhood without getting a nasty letter in the mail from the HOA (which I completely ignore). We spend a lot of nights in parking lots....which is getting more and more regulated. We have never been run off but we have had the police tell us we had to leave a few times...we did not leave but they told us we had to. It would probably be possible to spend the night on the side of a street in a city in most class Bs without too much trouble. Many of them just look like a big van. If it were just the 2 of us we would probably go that route...we bought our class c when our kids still liked us so we needed the room but now that they are nearly grown and hate us a station wagon with some blankets in the back would serve our purposes.

I do not know that I have ever seen a class B with a toad behind it. Most are built on one ton chasis where most class cs are built on 1.5 to 2 ton chasis. The smaller class Bs are probably about maxed out with the camper addition...most class Cs are nearly maxed out. I do not know that for certain though,

If I were buying just for me and the wife I would go Class B....depending of course on what kind of fuel mileage it got....6 MPG in our Class C certainly makes you think when planning a trip.

My sister and BIL have asked me about traveling in a MH in retirement and my advice is to buy a small. fuel efficient car or SUV, join all of the hotel chain loyalty programs, get a credit card with good cash back terms for travel and forget about the camper. It is great to have your stuff with you and there is nothing like waking up in the middle of nowhere with a lake right at your feet BUT it is a pretty expensive way to travel and if seeing the sights is the goal a car and a hotel room adjacent to or in a national park works about as well.