Re: Buying a used SMB and modifying the layout
I'd agree with two seats immediately behind the driver/passenger seats. I'd lose the passenger side dinette couch and reverse the fridge over there. Not sure about the 3 pt. seatbelts, probably have to have aftermarket seats with those built in, since you're right next to the door.
Unless there is something else you have to have about this van, it doesn't seem quite right for you based on what you want.