Caysea: If your husband only wants to travel 3-4 months and then sit at his home base for a month I don't think you should consider full-timing. He wouldn't be happy.
Would he be willing just to stay at a RV park for a month or two instead of buying a home base? That way you won't be committed to always returning to the same place. You mentioned Florida as a home base. Does that mean you wouldn't travel west? Florida is a long way from the west to travel back and forth every 3 months. I guess it depends on what your 'full-timing' idea is...will you be traveling or staying near Florida in order to keep returning to Florida?