All new coaches have manufacturing issues. You are not immune if you buy an expensive coach. The difference is how well the factory supports it's products. This is where the Tiffins, Newmars, etc. shine. I ran into a guy in Shreveport on my winter trip that was on his third trip back to Red Bay to have stuff fixed. He had been trying to get it back to California for a month.
Certainly, being around this forum, you did not go into the purchase of a new coach expecting zero problems. Read the thread
Control Your Expectations.