Your thinking and mine are the same re the actual wall I do plan to stay in it when I start doing 2+ day shows next year.
I negotiated and got a decent chunk knocked off the price. Absolutely everything was handled by email with, I think, only one phone call. It was nice to have a record of all my questions and the answers to them. Everything from this is the year, model and style of my truck, will it fit without adjusting truck or trailer, to when exactly were the brakes last done, and what is the exact age of the tires. Super, super service
ETA - handling by email was my choice - I hate the phone lol