I totally agree with the posted questions that the others have asked so far.

If you don't really know yet what you want to do with the car in the long term, ask yourself these two questions:
1. What is the worst feature or driving characteristic of this car?
2. What is the best feature or driving characteristic of this car?

This will tell you either what excites you about the car, or what you wish were different. Sometimes it is NOT practical to try to make a car good at something it is bad at to begin with. Perhaps it is more practical to improve or maximize what a car is already good at.

I know this is kind of a crazy response, but it is a different way of trying to decide what to invest limited mod money on.