Congratulations on getting her home. At least you know that what you've put into it will be for the betterment of the overall experience! You can tow safely and comfortably and rest easily knowing you have good wheels and cables. All Airstreams leak. The different models seem to have their "areas" of issues, so other Sovereign
owners could help there. Most leaks are somewhat logical. Bathrooms, windows, etc.
Definitely take lots of photos. Get some closeups too, and take a BIG DEEP breath :-) It'll all be fine. Unlike a wooden boat (which I'm very familiar with), leaks won't sink the "ship" :-)
I have a very very long road ahead with repairs and leaks, and I'm sure there will be many days of feeling discouraged, overwhelmed and worried. That's why we have this tremendous support group here on the "forums".
Looking forward to seeing the pix!