If you've never owned an RV before I'd suggest renting one for a week.
You will quickly discover things you like and DON"T like in that period of time.
Your first RV won't be your last. I don't know anybody who has ever owned just one RV so don't pour a lot into the first one.
And remember the golden rule "If momma ain't happy nobody is happy" Let her have the final say.
Layout should be your top concern.
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
The coldest winter I ever spent was a summer in San Francisco.