From reading the last few replies, I believe the first thing you have to get over is the "maneuverability" boogie man. That is just an extraneous piece that doesn't need to be considered. Also, the Daughter's study time, it is just as easy to read a book in the back seat of a truck or van as it is to do it sitting at a table.
If you eliminate these two things, you broaden your choices. As I posted, a Class A is not going to be easy on your budget, the repairs and maintenance, along with the fuel mileage will explode any savings.
A class C will have less livable space, in most cases unless you buy one with multiple slides. That newer multiple slide model is also out of your budget.
Your lifestyle would be best served with a slightly used truck, a crew cab, or van for the extensive travel, and a medium sized, used travel trailer. This combination will give you more maneuverability to access attractions (unhitch trailer) and you will have a home with more usable space outside the vehicle. It will also be the most durable vehicle with the cheapest repair and maintenance.
Again, forget about the maneuverability aspect of your setup. By the third week you will question why it was ever an issue. It seems you may have an entire church parking lot to park in so backing and towing are not an issue.