Welcome to the forums! I have family in Liberty Township. That has got to be by you?
Next time I visit them, I'll give you a call. Always fun to swap stories!
My advice to you: (take it or leave it
Step 1: Make it safe. Running lights mostly work, no propane leaks (or turn off the tanks), hitch works, new chains, running gear works, BRAKES WORK.
Step 2: Get rid of anything really nasty or disgusting in the trailer.
Step 3: Go Camp
Step 4: Go Camp
Step 5: Go Camp
Step 6: Improve the living conditions. Got power yet? Fire up the Refrigerator. Gaucho work? Hows the flooring? Tear it out and throw in a $50 remnant from lowes. (instant gratification)
Step 7: Go Camp
Step 8: Go Camp
Step 9: OK, so you have learned a little about your trailer. Now start "working on it". Get it watertight. Start testing systems. Mess around some. Take your time and enjoy the "hobby" (sickness).
My point? You bought a airstream. Go use it. So what if it leaks now. It probably has for the last few decades. I didn't have a working toilet in mine for two years. I still don't have hot water. so what. It's still leaps better than my tent!
I look forward to seeing you at a rally. They are great fun with great people. Metro-Detroit Rally is great for kids. You might set that as a "goal". 3 1/2 hours north on 75.