S-n-L,
Not sure this will help you feel any better, but I'm not sold on the "change your tires every 5/6/7/ years" concept. Our tires are 10 years old this year. We only have about 27,000 miles on them, and they still look great. I do plan on changing them soon, though, but I figure 10 years is a good service life.
However, I never take my rig out on the road without checking the tire pressure. Every trip, every time. The tires have NEVER been run under inflated. I haven't been "jumping curbs" or running over objects either. In short, I know the history of my tires. I think that is an important piece of the puzzle. On used rigs, you never know their history.
Putting new tires on your rig was a smart decision, in my book. I would not worry about the 2 years of sitting in a warehouse. Just treat them well. Get your rig weighed and adjust the tire pressure according to the tire manufacturer's weight charts.
As for RVDirect/AlbanyRV/WhateverTheirNameIs?, we bought our motorhome new from them in 2004. Dealer prep was probably non-existent. However, they were about $10k less than the other two GBM dealers for the unit we wanted, so the decision was easy. From what I had heard about them back then, I didn't expect stellar service from them and I didn't get any. I brought the rig back once for them to correct a bunch of minor issues. They were suppose to have it done in 3 days. Half-way through the last day I called them to confirm I was to pick it up that afternoon. They tell me they just started on it and asked if they can have it for another week? We had a trip planned, so I told them no. We picked up the rig that afternoon and it's never been back. I fixed all of the issues myself. Still way ahead on the purchase price, though.
Anyway, safe travels.
~Rick
2005 Georgie Boy Cruise Master 3625 DS on a Workhorse W-22
Rick, Gail, 1 girl (27-Angel since 2008), 1 girl (22), 2 boys (23 & 20).
2001 Honda Odyssey, Demco Aluminator tow bar & tow plate, SMI Silent Partner brake controller.