Problem is that people willl want to save it but nobody will want to fork the money. They could put a few millions on restoring that lauch tower but that's money that won't go on a probe to another planet as an example. What's more, such a structure is very costly to maintain as it is'nt very well protected against the damaging effects of weather. We'll have to keep putting money on it years after years. Tourism to the site will never come close to sustain the bill. Sad but true.
Nasa is on a tight budget. We have to prioritize. If people want to save the tower it's fine with me but they'll have to unsderstand that other missions (ongoing or planned) will have to be scrapped or delayed. OR we can increase even more NASA's budget and fork the bill to the people in the form of a tax raise. Not sure everyone will like that tower after that ^_^.
Then again I might be totally mistaken. Maybe it's not as expensive as I think it is to rebuild that tower. And maybe it will only take a minimal input of money to maintain it over the years. I'm no rocket scientist ;-)
P.S.: I'm pro NASA, pro space, and pro exploration. I just think that the money could be better used. (personnal opinion)