Having different RV over the years, beside number of family number changes, generally trailers are very good RV for people who don't drive far and stay for long. Cheap, lot of storage, don't require heavy TV and such.
But when you drive a lot, trailers make very lousy accommodation for lunch stop, when you are in hot climates. Even at the end of day- you should start AC 2 hr before your destination, or you will have to wait before it become usable.
That is where motorhomes for bigger family, or TC for smaller shine.
When motorhome offer lot of luxury, they are costly RV due to maintenance, insurance and registration cost.
TC offers less comfort, but is the cheapest and easiest to drive/park.
We own 12' single slide camper and are comfortable spending couple of months in it.
I like to shower every day, so have to fill water every 3 days, but that never was an issue.