Motorhome, camper help to choose

Good afternoon,all

We are after some help, advice please.

We are hoping to change from caravan to small motorhome, camper.

Requirements,length 6m max width(ideally shorter look to fit in space of 3m between walls. Tricky access so the shorter the better.

3seat belts ,LPG gas refill system.cruise control.parking sensors.

H/c water,loo and shower,window blinds,side door fly screens.

Microwave would be gt, but oven not necessary, roll out awning would be good!

Now we want a fridge that works on the gas and electric.(not only leisure battery)

Wow ,big list eh! preferably under 30000miles and budget of £40.000

We are living in Devon , any recommendations?