I own a 1997 37' Beaver diesel pusher. Beaver is a very good brand. For your specifications expect to spend a lot of money, probably as much as your house or more. They suck fuel like mad. Expect 7 or 8 mpg. Very roomy inside but most only have 1 bedroom. Trust me your wife will not want to walk around inside while you are driving, unless I have mistaken your intent. If I were to plan a trip like yours, which sounds great by the way, I would look at something on a sprinter chassis or similar. Keep some of your money, stay at a hotel once in awhile and don't take such a big hit on the depreciation. Just my 2 cents. If you need a driver let me know, lol. Good luck.