its like all projects the longer you have the car the more you will spend on it.you will buy parts try them if they dont work sell them and try other parts.also sometimes you get the chance to buy parts that come up for sale for mates rates and are too good to turn down.your car will keep evolveing the longer you have it.or untill you get bored with it.or drive something faster with better handling.its just fun doing it and seeing the fruits of your labour.and cuts and bruises.