Don't confuse maintenance items with updates. This is a 19 year old coach and it should have had batteries and tires replaced at least twice. This is not something that would increase the value of the RV but rather be things that would not decrease its value.
Satellite dish? That means nothing as there are many versions and some are completely worthless.
Only 2 A/C units? That sounds bad on a 36' coach if you plan to travel anywhere other than AK during late Spring to early Fall.
Front and Rear TV's? For a '99, that should read updated flat screen digital TV's with the sizes of each. If they are still the old analog TV's, you are going to have to spend some money to make watching any kind of TV possible.
I don't see an inverter listed and that's a requirement (IMHO) for anyone hoping to do anything other than moving from one RV resort to another.