Do you have a V6 or V8? If you have a V6 you should be able to get about 3" higher than most of the stock V8 guys with just a 2" RC lift and some F150 MLLs, which in my case only cost me $200. You can't get much more inexpensive than that. Don't forget that no matter which lift you go with, you'll most likely want to do spacers (or different wheels) and bigger tires so there's another $700 at least.
Silver '06 Laredo 3.7L
- 2" RC lift, 1.5" RC Spacers, 58643 MLL's, !Pinch Weld, Spyder Bull Bar, 130w KC Daylighters, Spyder LED Tails, Taillight Guards, Silverstar ZXE's, Interior LEDs, Kenwood 6" DVD/NAV, 12" Audiobahn Sub