Most people here are Class A owners and will steer you towards them and away from a Class C. Many are living in their motorhome or take 3 month vacations. So their needs and wants are not the same as yours.
I disagree because I've owned both. With your budget you are way more likely to find a serviceable Class C. Since you will not be living in a motorhome full time storage space and weight are not show stoppers for you.
Most negative Class C stories are false but some are true due to the ones over 30 feet. Because they are based on an extended van chassis you should stay away from those. Even a 30 footer is pushing the weight and drivability limits.
I've been driving both Class A and C's for 45 years. With a Class C 30 feet or less the drivability between the two is the same.
In fact I prefer driving a Class C. Most Class A's are similar to a Greyhound bus. Because I'm not driving a Class A every day a Class C is way easier to transition to from driving a car. Even the dash gauges and switches are the same.
The biggest plus side of an old Class C is the drivetrain is 95% the same as a standard Ford or Chevy van. Which means any mechanic anywhere can work on one.
Parts from the windshield to the tires will be a fraction of the price. The windshields, drivetrain, cab, and dash parts will be available in any small town or at least overnight. So you won't be stranded somewhere for a couple weeks waiting on parts. It is rare for a Class C to end up in a salvage yard if it wasn't wrecked or rotted out.
Class A's are based on heavy truck chassis which means way fewer of those chassis were made. And other parts were adapted from who knows where or were custom made for that motorhome only. Many old Class A's end up in salvage yards just because one part isn't made any more and used parts can't be found. Not fun if you are 1,000 miles from home.
Another plus is you can find 24 foot or less Class Cs which are no wider or longer than a dually pickup truck. Parking at gas stations, stores, restaurants, or tourist sites would not be a big issue.