The buyers assume they'll save money because they'll own the items instead of renting them. While that might be true short-term, it rarely works out that way in the long run.
Here are five things you should never buy unless you're rich enough to stop working:
You could rent a timeshare every year for the next decade and spend less than you would if you had you bought it. And you wouldn't be stuck with maintenance fees.
If you want to take a trip in a RV, rent one. You could also spend less by staying in a four-star hotel.
Buying a rental property to generate income is a good move, but buying a vacation home isn't. When you add up the amount you'll spend on your mortgage, taxes, upkeep and insurance, renting a house makes more sense.