Be polite during the purchase.
Run the awning 30 times, not just once.
Same with everything on the coach:
AC, heater, stove, drawers and doors.
Put a years worth of USE, NOT ABUSE, on everything you can touch.
18,000 miles isn't even warm up miles on it, and they're surprisingly speedy.
Vehicle wise you're fine, coach wise do as above and look for signs of child and cretin damage.
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