It's a nice tank setup, but it's pretty huge for a bp. The snake itself looks maybe a bit thin, but not too bad at all. (nothing a few rats won't fix) Is it just heated with overhead light? The substrate (flooring) looks to be reptile carpet. It's okay, but hard to keep clean. For a tank like that I would probably use aspen bedding.
I would ask what the snake has been eating (rats or mice, live or f/t) and how often it is eating. Not sure what they are charging, but they might be charging more for the tank than for the bp itself. The extra size in the cage can be okay if you fill it with fake plants and leaves. As long as the bp feels secure with lots of hide spots it should be fine. It's not easy maintaining humidity in a tank that large. You can cover most of the lid and mist around shed time. If you have a friend that knows snakes you may want to take them with you to check it out. You won't notice any issues unless you know what to look for.
Good luck and welcome to the site!