We're planning the same. Sell the huge house that sits empty more than half the year, store what we want to keep, and hit the road. We've budgeted between $20-25,000 a year for accommodation, fuel and maintenance. Even if it's more, we don't see a problem.
Our house costs us about $1000/month and we already spend about $15,000/year using our coach.
The good thing is that where we live, the houses are worth huge sums, and the money we would bank would cover our expenses a few times over.
We plan on travelling at most two years, then buying a condo, and continuing the "half-timing" that we currently do. Of course, we'll reassess as we go.
Robert and Louise
2014 Anthem 44SL and 2014 Ford Fusion Hybrid