If you don't get any other replies you might consider taking it to your AS dealer. I see that you have one that might be close - BRETZ RV AND MARINE.
Our dealer was willing to do two different types of walk-throughs with us as used trailer owners. We would have had to pay for either of them. One was about a two-hour walkthrough with a repair tech. who would go through the checklist that they use when someone brings in a trailer for trade. The other was a 3-4 hour session with a tech and a salesperson that went into more detail, and was slowed down a bit. We wanted to do the 4-hour one but just couldn't get it scheduled at a time that worked out for both of us. I think the cost for the longer session was around $450.
If you bought your trailer new from Bretz they might even do it for free.