Hopefully you'll get lots of replies for your questions.
For beginners...Lots of people (including retired military) have less than $2000 a month coming in. IMO that doesn't leave much $$$ and a tight budget is in order but very doable and many do so.
Learn all you can about Tricare. Learn about RVing and "famcamps" and have fun.
Even though we have a house also...learn ins and outs of Space A. And the ridiculous prices they now charge for billeting, for when you want to go somewhere for change of pace.
Fuel is ongoing major expense. We know a couple that doesn't leave AZ. They go to northern part in summer and southern part in winter. Another couple we know that spend about 4 to 6 months camping all the way from Mich to AZ. They move as the weather moves, trying to stay in 70 degrees weather. Lots of "full time" info and blogs to check out.
We enjoy Penfed credit card for 5 percent rebate on gas/fuel. That's 5 percent on purchase price, not 5 cent on gallon. Big difference.
We don't go out of our way for famcamps anymore as their prices not like they used to be. Like anything else some are good some not so good. Lots of American legion and VFW's have rv spots. But we find most of our time is spent at out of the way campgounds and pull into a thousand trails to do wash and get batteries caught up. After about a week of being around lots of people, break out the map and see where to go to next.
One of your problems will be keeping the passenger seat empty, then again I hate to cook:)
