It looks like a good deal compared to similar coaches in that category. The tires do not add any value as you would expect the coach to have decent tires. The same goes with the waxing, no smoking or pets(easy to hide). If this is the floor plan that you are looking for, ask about maintenance records. If it is in as good of condition as the owner claims, than he must have all of the service records.
If the owner claims he did his own service than you have to trust a complete stranger that he knew what he was doing, when it comes to mechanical and house issues, and that he actually did it according to factory recommended specs.