Several options for a YJ. You can do a body lift which is cheap but I would not recommend anything over an inch or so. You can do a shackle lift but again I wouldn't recommend anything over 3/4" to an inch. and you can combine those two as well. From there you step up to suspension lifts. Rough Country seem to be the most cost effective lifts around. They have mixed reviews but I have run three of their kits with no issues what so ever. They run under 500 bucks usually. You could also do bastard packs which is where you build your own leaf packs from junk yard donors. Hope this helps a little.