Thanks for the link 2gypsies! I've heard of Fulltime Families but need to research further. Seems like a great opportunity for community.
Kirk- The plan is to have renters in the house. We have never owned an RV but have owned a boat with sleeping quarters so I'm very familiar with maintenance, upkeep, cost of ownership, depreciation, etc. Our kids are already in a homeschool program so education would remain unchanged with exception to "being able to see" history firsthand as opposed to just reading about it in a book. Our oldest child (10) is gung-ho, the others are a bit more impartial. It would no doubt be different than anything they've experienced but then again our transition would be from Africa, not suburban America so I'm fairly confident we'd do fine. If not, we'd still have the option to return to our domicile, move back CA or even Africa :-). Thanks for your great questions. You are certainly correct, there are many factors that need to be considered. It's not a decision to be taken lightly.