So you've wanted this, and now you have it- if you still do. How much do you want it? This is your investment for a year.
Think of it like the tax man; there's depreciation and cost per mile- what's the most you can tolerate? This is your anticipated loss. Let's say $10k in a year. Can you stomach this?
Then look at one year old comparable units at rvtrader.com or etc. And see if the resale value is around or higher than your investment-loss (60-10=50 for example).
The the only thing to justify the (10k) first year's is your enjoyment. If you can't stomach that much "fun" now, then better to back out and find an option that you can live with later on. If you back out and take it slower, what do you lose?
After all, this is disposable income- and only you can decide how much to dispose for something you want.
