I've said it before and I'll say it again...... The decision on whether or not to purchase an EW, is highly personal. First, you should ask yourself the following question:
If I have a major failure, will it impact me financially, to the point where my coach will sit in my driveway, un-usable? Paying on a loan for an un-usable coach would be even worse!
Then it becomes a question of personal risk tolerance. Educate yourself on EW's and know that the odds are against you collecting what you put in. Also note that there are different levels of coverage. Our EW expires in September and IF I renew, it'll probably be for drivetrain only coverage. A $15,000 engine failure would cause me some pain. A $1500 refrigerator, not so much.
It's your decision!