Retirement trip reminds us of the joys of RVing
Having recently returned from two weeks in a Class C Winnebago in Alaska DW and I were reminded of the joys of RVing. We talked to many fellow travelers in Sprinter based class Bs like the Roadtrek, Pleasure Way, and Leisure Travel conversions who loved the great gas milage and ease of parking that the small RV allows. Other travelers could not imagine anything less than a 42' Diesel pusher with bath and 1/2 and onboard W/D.
As others have previously mentioned this is a very personal decision that no-one else can make for you. Living for an extended length of time in a straight Class B is certainly possible but would take some compromises form both you and your spouse.
We have been shopping around since our return and have made a few observations. The market for Class Bs is relatively tight with waiting lists for some models and high resale for used units. That would suggest that you could use one for a few years and get much of your money back in resale if you chose to move up or find you do not enjoy RVing as much as you thought.
Many dealers have huge markdowns on Class A RVs with discounts of 20-30% off of list prices common for units that have been on the lot a while.
Very nice used Diesel pushers are available for around 100K.
Class C homes can also be had for significantly less than MSP and there are tons of nice units available from sites such as RV Trader.
The drawback on larger Cs and most of the As is the poor milage and the difficulty of parking in some Nat'l/state park sites.
It seems to me that purchase of a nice used unit might be the best compromise since the downside would be limited if you buy it right and have to take a bit of a beating when you get out.