I'm in the camp that quality lasts. Buy as nice a coach quality wise as you can, dropping years to remain in budget.
Agree that a coach that is used and cared for, may have some miles on it.
Save some budget money to cover any 'baseline' maintenance needs, and any mod's to make it 'your coach'. (TV's mentioned is quite common, if not done already. Many are also jumping over to a Pure Sine Wave system to support all of the electronic toys people like to carry now. And some coaches don't age as well as others, from a design view point. (Orange rugs, one example:)!))
Another advantage of a pre 2005 DP coach (but go by engine, as some 2005 had 2004 engines in them), is the engines had less smog and were KISS'er.
Keep researching, narrow down your list of manufacturers and models you like, then go kick some tires. I like private owned, with documentation coaches. Though some consignment units will also have good documentation.
Best of luck, have fun,
Smitty