Don't forget to include possible costs like storage fees on a large class A, maintenance, and other things like getting it ready to go. I spent well over one grand on things I needed for my RV and I was very picky about what I bought. If I didn't need it, I didn't buy it.
All that said, I am one of those "if you can't pay cash you don't need it bad enough" people so I won't go there. I get it though. I waited five years to save enough to pay cash and we could have been having fun five years ago. Oh well. But I would urge you to buy used. No need to pay depreciation when someone else is willing to do it for you.
Good luck and I hope you have a blast with whatever you get with your family!
