Just remind your wife that the bigger the RV, the longer it will take her to clean it. :-laf Seriously, if you're not full timing, anything over 30 or 32' will become a chore. Sometimes I wish we had a 19' for weekending and our Wildcat for the week long trips. Luckily, my wife is very practical. She insisted on more storage space (keep in mind that stuff expands to fill the available space) and a bed that you can access from both sides. I'd do without carpet if I could find one and just use area rugs. Aluminum siding is lighter than fiberglass and offers dent vs. crack on those "oops" moments. If the trailer doesn't come with 16" rims with LT tires, make sure that you can upgrade, i. e. have the space. I wish mine had a bigger fresh water tank because we dry camp as much or more than we hook up.
I think we have our trailer insured separately, but I'm not sure.
BTW, we drove past a big RV place on I-5 near Eugene the other day. They have very nice, high-end bus conversions. One was marked $250,000 off MSRP! Two hundred and fifty thousand!

I missed it, but my wife saw it. She laughed so hard I thought stuff was going to launch out her nose!