I don't think it is law, spouses have to sleep in the same bed, every night on vacation. Although to truthful, I did not check.
I sleep up top, DW on the dinette. I find the following to be true for us.
1) dinette, breaks down and sets up in about thirty seconds. it is much more of a hassle, to say pee the dog.
2)I kind of like having a separate sleeping space, as does she. I go to bed before her, she can stay up and read etc. As can I. Each can get up and go potty, or get up before the other without disturbing the other. And if we are feeling frisky the dinette bed works just peachy.
Works for us, may not for others, my point is, especially for an older couple, (we are mid 60's) you don't have to always sleep in the same bed, while in the MH. And that may open up some other options, for some folks who are looking to buy.
Ours is a 24ft Coachman. with a small slide. I know people always claim a 27 is not that much different, but in my opinion, when it comes to parking at a store restaurant, or attraction, that three feet can be a big deal.