Hi, I'm a young broke highschool student but I love ti upgrade my Tj. Currently, I've got a 2.5in rough country suspension lift(i know its not the best but it was cheap). I've also got some KO2 33x12.5x15's on it. I want to get the lift up to 4 in however I don't have a lot of money. I'm thinking of adding some 1.5in spring spacers to get me to that hight. i know its not the best thing to do but its the cheapest option. Should I consider another cheaper option? Also what other cheap upgrades will I need when I add the lift? Thank you!!