Thank you everyone for the replies so far. It seems every time I figure out something it leads to 3 or 30 more questions.
We are looking at an RV instead of a tow behind because it would allow my daughter to school while driving as well as allow other things to go on while we are traveling (TV watching, book reading, computer games, sleeping, and so on). It would also allow me to interact with them while we are driving. Schooling is probably one of the biggest drivers on this decision.
The length of the RV is to make it more maneuverable in tighter spaces. We understand we will be crowded but since it's only for 1 to 2 years we think it will be ok. (But I'm a guy so what do I really know about how much space a woman needs). However, I am leaning towards towing a car behind which give me more storage space but pretty much kills the easy of maneuvering plan.
We went to an RV dealership by the house and tried to look at what they had on the lot. However, when I explained that I wouldnt' be looking to buy until around June, the sales lady basically told me "That's nice" and then made it very clear (non verbally) that it was time for me to leave. Work and other requirements make it very difficult to get to other dealerships to look at vehicles.
Again, thanks for the advice, comments, ideas and help.