There are lots of ClassB’s out there, some more expensive than others, some very high tech while others and older models more low-tech.
I prefer older, and low tech. I have an older ClassB on a dodge sprinter chassis with a MB Diesel engine. I love it, get good fuel mileage and it is a fully self contained house on wheels.
They are a bit more pricey, but you have a vehicle and an RV, and personally I feel it is the best way to travel. Well maintained and with workhorse Diesel engines, their resale value is higher than you might expect.
If you can do small, which everyone cannot, and if you get along very well with your partner.
The ClassA’s are serious gas guzzlers, and that and their sheer size makes them prohibitive for many of us. I would not have one, even if I could afford it. Their size also limits campground options.
Campground rates vary widely, from free to $100 or more a night, depending on the type, area and time of year.
I like the AllStays app, which gives you private and public campgrounds, their rates and amenities.
We have always had the “spend less, do more” mindset, opting for less expensive campsites so we could afford to travel and see the country.
As a widow these past almost 7 years, I tend to go more to favorite places and stay longer, still mixing it up in terms of campgrounds but sometimes opting to spend more for a longer stay with full amenities in a beloved place.
As for showering, there are lots of tips and tricks for minimizing water usage, and as you get down to the wire perhaps explore some of those threads here.
If you have never camped or RV’d, I would suggest caution in plunking down lots of money for something until you have a pretty good idea of what you really want and what you really need.