[pauwas]

Besides the roof crack, both doors on the driver side were damaged somewhat. I am trying to get an estimate on the cost of fix both doors. Hoping someone with recent experience can share.

I have a '16 and I'm fairly certain that is not a plastic roof. Looking at your photos, my guess is someone didn't the best job repairing a dent in the roof. The body filler has since cracked allowing moisture to penetrate and the metal underneath is now rusting.
Best of luck with your MDX search.