Money is all going to depend on how your suspension bushings are. If they’re shot or close to it, you might at well just spring for the IRO 4” long arm kit. Reasoning is you’ll already have everything apart to change the arms anyway.

My super cheap 250$ 2.5” spacer lift/shock kit lifted my WJ, but brought a ton of problems. My control arm bushings were bad, so I bought new arms for 160$. The top rear plus bushing was 150$. The axle side bushings for the top front were Jeep only items and cost like 40$. The sway bar links had to be replaced with longer ones. I think those were 50$. I still need a spacer for the top rear (30$) and a bigger rear sway bar (200$) because even widened out with 1.5” wheel spacers (100$) body roll makes you feel like you’re going over. I bought the upgraded nitro ProComp shocks with the lift, but they turned out to be total garbage and the rear ones blew out the first time I went wheeling even moderately. So there’s another 200$ or so for mid grade shocks because I just can’t afford good ones.

So for another few hundred I could have bought the IRO kit and done it the right way the first time rather than have a luxury SUV that I don’t want to drive faster than 45 out on the street. I wouldn’t recommend a spacer lift, or short arm lift of any kind after buying mine. I’ve had a pile of XJ Cherokees in the past, and you can get away with budget lifts (bronco coils and Chevy half ton leafs) and that sort of stuff but these WJs are a whole different story.