I'd add another perspective. Our son's dog ate a rock and $2200 later he has a keepsake. Now he's got pet insurance. He still owes us money from the surgery but from now on, he's fairly well covered.
But he's young and doesn't have a lot of money sitting around. Paying the $30 a month is a small price to pay for not being wiped out when his hyperactive puppy breaks a leg or eats another rock.
Same with RVing. I'd never advocate waiting to get on the road until you have some arbitrary amount of cash in savings or you can buy a rig with cash. If you need to finance (as we did) or buy an extended warranty to live your dreams, do it!
Generally, we don't see extended warranties as a good thing but if they help you get on the road now, so be it. Life is short and sometimes you have to finance your dreams to make them happen. As long as you do that responsibly and with eyes wide open, it's never a bad idea. You can't take it with you