Looking at Wildcat's site the spec's show the one in the 32 range and the one that is 38+ feet to have less than 500 pounds difference in GVWR. So I would question the 38 footer for extended stay use. Maybe you should be moving up the ladder a bit on quality if you plan on keeping it for many years. Forest River has a extensive list of brands from entry to high quality. We winter in the SW in a 2005 29' Cardinal and do just fine!
If buying new, be sure to get the right one, as you real take a hit if you have to trade in the first couple years to want you REALLY wanted. Chris