Alright you wanna do it right and you wanna do it cheap. To do this you will have to do your research and do it well. First off GC will rarely be too cheap. As previously said they gc/koni setup is a bit out of your price range. But anyways.....find out which spring rate is going to work out best for your desired setup. Like i said, this will take some research. Buy u some $50 ebay coilover sleeves. Ditch the springs bc they will be shit. Do some price searching on the desired spring rate u need, if your lucky someone will sell some used, often times on scca forums they sellem. Find some used konis. Used is cheaper but does not guarantee quality condition. If you arent running a hard spring rate which from what it sounds you can save money and buy a set of tokico illuminas cheaper than konis. But if you want to do this it will take time, effort, and research. Best of luck