Hello. I am a first-time pop up owner. Recently purchased a 2006 Fleetwood Bayside from Facebook market place. It has a few issues, most notably some water damage to the ceiling. I got it for what I thought is a great deal (I only paid $700 for it and I routinely see similar campers listed for 3k or so), so I was willing to take a chance on it. The A/C does not work, which is not a huge deal to me, and the previous owner believes that is where the leak originated. I was thinking of just pulling the A/C out completely and putting a window or something in place of the A/C unit if that is an option? I've attached some pictures of the damage. I am fairly handy but I am also a complete noob when it comes to this stuff so any help/advice/feedback on how to fix this is greatly appreciated. Thanks in advance.