From the sound of your description it seems you really like your coach. If you feel confident of the mechanical side of things then an interior remodel might be kind of fun for you. New furniture, new flooring, maybe some paint or wall treatments.
When we bought our first coach five years ago, we bought a used 2004 Damon Intruder and it was a good coach for us. The thing that bothered me though is there were features that came out in 2005 and later such as the Allison Transmission Grade Brake. I also would have liked for the AC units to have the capability to heat. And there was more on my list of wish-to-haves. We recently traded our 2004 Damon Intruder for our 2006 Fleetwood Pace Arrow which has every single wish-to-haves in it. I really feel this one will be the last for us. It will be babied and spoiled rotten!
I guess my point is if you are happy and not yearning for some new feature or a different floorplan, etc then why give it up?
As far as nickel and diming, probably not a big deal for you when you consider the price of a new or newer coach. Heck, even if the engine and/or tranny go, you will still save over what you might spend on a newer coach!
