Salty Nauti

Hello everyone. I need a little help with something. I am moving down to Tampa, FL this coming fall. I will be buying a boat hopefully soon after I move. I am not exactly sure what I am looking for but more then likely it will be a 1997-2002 Nautique. The problem is that the boat will spend most of the time in salt water. My question is what adjustments will I have to make, besides closed cooling, to have the boat last a long time in salt? And how much should I look at spending. I know that some people say as long as you rinse it and flush it after every use you should be fine. However, I am the type of person that needs peace of mind knowing everything will run fine. So what will I have to change? Does anyone in the area know of a dealer that would do the work and has experience?