Almost all manufacturers have a few floorplans like this, but some favor them more than others. When I was shopping in the 2004-2007 era, that would have been Newmar and the Monaco Corp brands (at least the Monaco and H-R gassers being built in the H-R plant). It looked like there was a standard bathroom module that was fit somewhere in each floorplan.
Many other manufacturers were using mostly a split bath plan so that a center aisle became part of the bathroom space, usually opening into a rear bedroom. this saves some space in the RV but can be a problem for occupants that prefer more privacy.
What I've been seeing more of lately, particularly in larger motorhomes, is a bathroom combined with master bedroom, and a second more private half-bath nearer the living area. Usually at 38 feet or longer, and particularly in the 42-45 footers designed for two-person full time living.
Private bath with side aisle models are out there, you just need to do more looking. Price? When I was looking, and the motorhomes were new, some of these models were around $50-60K list price. That's about doubled since.
If you are not going to be traveling in the RV, just leaving it one place forever, doesn't much matter whether it is a diesel pusher, gasser, fifth wheel, travel trailer or park model. If the park handles park model hookups, that's probably the best solution short of an actual mobile home, which should be a better built house at any given cost because you are not paying for roadable chassis and RV self-sufficiency items like waste storage and on-board generators.
Tom Test
Itasca Spirit 29B
