Not to get personal, but with what you've thrown out here, it really sounds like you need to have a sitdown with your wife and discuss it with her.
You mention moving, but don't indicate your wife's preferences (or even that she has an opinion).
You mention a 50% chance she'll go with you, but that she doesn't like RVs. But you seem set on going for 6 months at a stretch without her. How does she feel about that?
You mention the kids will be "out of the house by then". If your wife does not go with you for the 6 months, is she OK with moving to one of these two "places" and potentially being far away from the kids AND having you gone for 6 months?
There is a lot of "I want" in your post, but it doesn't sound like you've put any thought into what your wife wants. That's a red flag to me suggesting you perhaps aren't happy in your current situation. If that's the case, I would recommend figuring out what you really want (do you really want to travel, or are you using this to push things with your wife to a head?) before you start making plans for your RVing life.