Hello, I'm not new to RVing, but am (about to be) new to RVing in a Class A motorhome, and could use the help of those who have been RVing in Class A's for a while. I'm in the process of buying a 2004 Country Coach Inspire 40'. This is a major investment, which will depreciate of course. My questions are: 1) What can I do to keep the depreciation to a minimum? Obviously, recommended maintenance and don't let it sit more than 2 months at a time, but how about any additional maintenance or tricks? Do those 'skin tight' covers provide any significant protection, and if so, are they reasonably easy to install and remove? How long do they last? 2) What differences do I need to keep in mind between this and a 5th wheel (driving and using)? 3) Anyone know anything to watch out for in Country Coaches of this vintage? 4) Anything I need to watch out for with the Allison transmission of this vintage? 5) I get 25% improvement in gas mileage when towing the 5th wheel (Gas pickup) at 55 MPH instead of 75MPH. Will I see comparable savings in the diesel (350HP Cummings) pusher at 55? How long will a tank of diesel last (sitting) before deteriorating or causing problems?