They are in the business of selling ...... porduct OR services. Like everyone here says, just inspect things a few times a year and keep things clean and things will last a long time. Take care of water issues promptly as water will rot out wood quite quickly. If you are not able to get onto your roof occasionally then ask a good neighbor of yours of even another RVer if they would help you out. Most folks are willing to be helpfull I think. If you are able to do the climbing then read up on maintaining your unit and don't be affraid to tackle a job yourself. the internet is your friend. Its really not difficult.