Though many class C's accommodate 5 people, I advise you spend some time looking at Super Cs to determine if they are a viable option for you. For the most part, you won't have a worry over-loading them or their tires. I don't know the used Super-C market other than paying more than a conventional E450/4500 chassis version.
Some super Cs are ridiculously huge, like driving a tractor trailer. That's not what I am talking about. Look at the "mild" versions which will also be much more affordable, something along these lines.
