You're probably looking for a newer model that is unlikely to give you any problems, so perhaps my input will be of limited use. However, my 1993 class B has something that I don't believe any newer class B has, and that is a sizable bed over the cab, due to the bulbous fiberglass "muffin" top on top of the Econoline chassis. I can't find the receipt for the custom mattress that was made for the bunk a few years ago, but I just did a quick measure with a tape measure, and it looks to be about 74" x 66". It's a very comfortable space. When I'm up there, looking down on my little living space, it almost feels like having a second floor. I also appreciate the front facing window over the cab, that is great for stargazing and looking at the beach when up in the bunk. Some folk don't like to clamber up into bunks with limited headspace though, so this may or may not be a consideration for you.
One big plus for me, was that I couldn't justify purchasing an over $100K rig, so the purchase price of $16K and the immediate $5K that I put into it gave me a very affordable way to get out onto the road. Downside is that, although it's a 30 year-old van with still only 67K miles on it, it could potentially have a major issue at any time. I have a great mechanic, and take preventative measures. Still, it's 30 years old. Because it's an older RV, I have had to spend some time on it sealing and maintaining the roof penetrations, changing out some of the RV parts (plumbing, vents, conversion of lighting to LED), etc. I've enjoyed it, but it's not everybody's cup of tea. Older RV's = work, albeit less than an old class C.
Last year, I spent a wonderful 4 1/2 months taking a trip in it around 6 Western states with my cat. I had a great time, and my amazing kitty was just happy to be with me. However, I did spend about 10 days in Durango, CO waiting for an appointment to have my fuel pump replaced, when it went out halfway up a mountain! I managed to turn that stay into a good time, but I suspect most folk in this forum would prefer the expected greater reliability of a new vehicle.
Incidentally, my rig is a 1993 Airstream B190, and it guzzles gas like nobody's business. Typical mileage is about 10mpg over long trips, and less when about town. I'd post pictures, as mine is in good shape and looks quite handsome, but I'm a bit weird about privacy on this forum. Plenty of photos of them online though.