Travel Trailer Depreciation?

We just sold our Rocky 2604 after only having it for 1 1/2 years. We bought it for about 33% off MSRP. Never expecting the changes we're making in our lifestyle now, we looked at 5% interest we'd pay on a loan vs 8%+ on our investments. Debated whether we should take money out and pay cash, but decided that seemed like a no brainer with making 3%+ more plus being able to deduct the interest as a second home. Now the bad news. Long story short, it cost us about $1000 to sell it. One of those things that if we knew then what we know now, we'd probably have kept our '07 ROO 23SS or just gotten out of camping entirely at that point. I can't imagine how folks that trade every couple of years keep from taking a bath on it....maybe they don't avoid it. I checked NADA, did tons of online searches and our price was right where it should have been, except for that darned $1000. So guess the answer is that you need to keep it for 3 or 4 years or so to come out at least even, maybe ahead a smidge. In any event, it was a key part of our changes and we're just thankful it wasn't any worse. The man who bought it is from LA and had seen the layout, but he said he never buys new and had a heck of a time finding a really good almost new. We feel like he'll be a good "dad" for Rocky and take excellent care. Making this huge change is like watching money flying out the door, which it really is, but in the big picture we'll be ahead when the dust settles.