Retired, want roomy "portable apartment" for two only

What you are talking about is a traditional layout in a 5th wheel. The extra sleeping space comes from a sofa bed, using the both dinette as a sleeping area, etc, Our sofa in our 5th wheel has storage underneath, not a hide-a-bed and we have a stand alone dining table. We say "6 for drinks. 4 for dinner,and 2 for sleep." Just look for a traditional floor plan. There we tons of them out there.