I have owned every type of rv on the market. Each has their own pros/cons. This is what I discovered.
Before you sell your rig. Rent a class c before you buy one. It will be money well spent.
Please don't be discouraged by my list of negatives, I just don't like people being surprised after dropping $70-$140k on a 'C' after giving up something they liked. Remember you need to earn 2x that amount in order to spend that amount.
Think about towing or not towing car behind you. Research flat vs dolly towing, only certain model cars can be flat towed, all 4 wheels on the ground. Could be $3k to set up a towing system. Coming from a trailer, you'll be giving up a vehicle to explore and sightsee.
You might not like the way the 'C' rides or handles, especially coming from a fiver which is a solid tow. Many owners have to spend a few thousand in aftermarket parts to find a comfortable ride. The longer rv body on a short wheelbase can react to crosswinds and big rig bow waves. Some gas powered A's have those issues as well. I never had to deal with that with any trailer once I set up the hitch properly.
You have to watch the rear overhang on certain 'C' floorplans because the rear can scrape . That's why some of the rears angle up.
Therefore if you have a steep driveway apron you better check into the clearance before you buy.
Some add air bags to help with clearance but keep in mind AB's are designed to bring a loaded sagging rear back up to normal ride height. If you already sit level an AB will only offer you approx an inch more height, depending on the configuration. Changing the tire size could give you a additional 1/2" and that combination might just be enough that some owners need for clearance.
MH's are going to be more noisy than towing because you are riding inside the same cabin as your pots/pans and whatever decides it wants to rattle. What's not making noise today might make noise tomorrow.
If your pickup is a top of line model , the class c cab might be bare bones without the bells n whistles. If you like those comforts, then make sure you have them when you make your choice.
Remember the bigger you go and the bigger the slides the closer you have to monitor your payload. The 450's are 14,500.
With all the negatives, I would still prefer to own a 'C' or a 'B' because I use my rv for day trips all year round. They fit my style so I deal with it.