Bought my first trailor
Kirkl: Go to an rv dealer and get a couple tubes of Devcon caulking. It is a real sticky caulking and when you draw the bead out it will find its own level. Great for caulking around roof seams. I would asked the dealer about what to use around the windows. You can use Devcon across the top but I don't recall how it sticks down the sides. Maybe do a little at the top and let it run down the sides. I don't know.
JN: I think you will find that all trailers in the Prowler class are about the same. I had a Starcraft 24ft and my neighbor had a Prowler 23ft. The layout was different inside and the color was different, but the basic construction was very similar. The appliances were the same. So if you check around and have the same luck that Kirkl did I am sure you will be on your way to some good times camping. Just don't skimp on the safety items. Proper hook up with right hitch, tires inflated properly, brake control unit working properly, etc. Nothing spoils a vacation more than a travel trailer that is turned over on the highway because things weren't prepared.
Good Luck.