a friend had one but sold it for a caravan as she said when you got to where you were going, if you wanted to go anywhere you had to trapse about in your motorhome, like popping to the shops or going for a meal etc
We had A McLouis. 5 berth, nice, almost new motorhome. Comfy beds, good heating and air con.It had seat belts on all seats which were 6 passenger seat belts as well as 2 in the front.
It was good fun but like furball says a real pain when you want to pop out for a pint of milk or something!
We went to campsites with it mainly and were able to stay over at friends house without inconveniencing them.
Sold it when we realised we weren't using it as often as we thought we would and also I used to get really really sick when travelling in the back. Daughter got sick too so she used to go in the front!!
I have a small converted mini bus. It has 2 passenger seats. I left 3 seats in the back, well 2 just now as the third single is out to give a more sensible sleeping space.
Proper motor homes will normaly have the 2 captain seats in the front and perhaps 2 more seatbelts int he back at the dining table area. Sometimes you get an additional single seats too. But not likely to get more than 5 seats unless you buy a huge winibago.
I am using my van as my main car for now and use it a lot for work, not so much with kids. You really do have to think about how you will get out and about when away. A self standing awning is essential, you can leave it all set up with the contents inside. If you have to drive of you have to secure all the cooking stuff and perhaps put beds away to use seats and belts. Depends on the type of holiday you have, if you take bikes and get all supplies on site it fine.