New guy with a 1998 Jayco Lite Hawk and some questions

I am in need of some assistance. I have just recently bought a 1998 Jayco Lite Hawk that is turing out to be a pretty bad purchase. So far Ive ripped up the floor in over half the camper and replaced and today we got a very heavy rain and I found a couple leaks. One leak is coming in under one of the windows. That does look like it could use resealed so I think I am just going to caulk that. The other one is coming in from the roof. The water is dripping through the light, but I think is coming in around the skylight or maybe the seam up front. The camper roof looks like it was recently resealed but I see a couple small cracks where it looks like some water could be seeping through.

Weve had a few smaller rains prior to this one and no water has found its way in. I would like to repair this roof but I am already in this camper more than I wish I was and would like to do it as affordable as possible. I have no idea what kind of roof I have, but I think its a rubber roof. I've ordered 4 tubes of Dicor lap sealant after doing some reading, so hopefully I'm on the right track there.

I also have a couple areas of damage to the shell of the camper that I am not sure how to tackle. At this point they have not become a problem, but I fear they will if I don't just do it now. I'm not too awful concerned about the looks, just want to keep the water out. I'm posting some pictures and would just like some advice on how to tackle the roof issue and the shell isues please. Thanks in advance.

Here is a couple pictures of the roof..




Problems?






Here are some issues with the shell. The camper had a tree limb fall on it at one point so thats what the damage above the door is from. Also, don't worry about the duct tape. There was a puncture from the same tree limb but I've got a piece of aluminum to cover that with.













Sorry for all of the pics, I'm just a little overwhelmed here..