Your usage habits have a lot to do with whether you're better suited to a trailer or a motorhome.

What are you planning to do with it? Are you active? Do you like to travel around once you get to where you're going?

The motorhome has the disadvantage of not being able to detach and drive away. If you wish to travel around your campsite once you park, you either need to have towed a vehicle behind you, or you have to pick up camp and drive the motorhome.

The trailer does require a tow vehicle, but a truck is a very useful thing to have anyway, especially if you're a DIY type of person. The ability to detach and have the vehicle separate from the trailer is a benefit, in addition to having the ability to carry extra stuff in the pickup bed.

The interiors of both a camper trailer and a motorhome are pretty well the same, so it just comes down to propulsion method. For a given "length", a trailer does give you more living space since there are no driver's seats and no drivetrain to fit into the chassis.

Growing up, we had both a 21' ultralight trailer and a 25' class C motorhome. The trailer won hands-down. Would comfortably sleep 6 and we towed it with a '96 Ford Exploder.