That is almost the same kind of floorplan we are hunting for. 10 years ago there was a popular floorplan. where as you walked in near the front of the trailer there were bunk beds (2 beds) the top bed was slightly narrower, the bottom bed was a small queen. They were the width of the trailer with a narrow closet on the one side. Then the bathroom came next, then the rest of the living quarters. I think what killed that one was people wanted "separation" between where the kids slept and the mommy & daddy.
All this was in a 24' trailer. up to a 28' with a larger slide. Now to get the parents bed up front and a bunk setup in the back, your looking at a 30'-32' RV or a little smaller, but without a couch.
I prefer to stay in the 26' to 28' range. The hybrid we have now
( 26') fits all that but is not a 4 season unit. This will now be the 5th season in it, and will keep our eyes open over the next few years for something. On our way to AK. in a few weeks we are stopping at a Arctic Fox dealer ( in MT.) to see their quality of that RV.
But that floorplan I said from 10 years ago, I can't believe no one makes it. Even if someone did, I'm looking for more of a higher end RV anyway. (Winnebago, Arctic Fox Bigfoot...) I can only hope the 2017's now being built, there might be that floorplan out there.