When we bought our Class A, bunks in a Class A were not common at all. Shortly thereafter, almost every manufacturer had them. Almost all very similar. There was only ONE bunk arrangment that I might have considered IF I were buying. I forgot the manufacturer, but they put the bunks on the OTHER SIDE of the bathroom than the floorplan you show. That is, towards the living area. And I believe it WAS a gasser model too. And if I'm not mistaken, one of the manufacturers with a better reputation. But sorry, I don't remember which one. I think it came out late 2000's or so. But I never saw one in person.
My reason against 99% of the bunkhouse models is I didn't want "tender ears" a paper thin wall away from the "mommy & daddy" space. One thing, quite unexpected to me when we were looking, was wifey's shall we say "friskyness" when we were out on vacation and she could relax. The model I was mentioning above had lots of separation between the adults & the kids. With the A/C's or heatstrips/furnace running, there was very good sound isolation between the spaces.
Our rig has the dual sofas up front and along with the dinette, this floorplan has met our needs throughout all of these years. I prefer the idea of having more dedicated living space than sleeping space for the kids. The kids had no problem with it either. Even now, when they're in the later teens, it still works out. But dual sofas in a gas class A are pretty rare nowadays too. So....I guess my next rig will have to be a big ol' DP! LOL
Good Luck in your search.
~Rick