98+ trucks are relatively easy to lower. I lowered my brother's '01 XL 2.5L....using a DJM 4/5 kit. We started at like 6pm, and ended at about 7am. We were bullshizzing along the way of course. The DJM kit included everything....upper arms, lower arms, coils, sway bar links, rear flip kit, ball joints, bumpstops, etc....more doodads i don't remember what. I know we also needed to get cam bolts for the upper arms, purchased from summit. Shocks were extra. He also got a low profile tranny crossmember. I don't really know what's all involved with a 3/3 or 3/5 kit......but i can assume coils and a flip kit. The kit can be installed using normal shop tools.....normal hand tools....but we used the air compressor too.
I don't think i've ever seen lowering spindles for a 98+ ranger.
If money is tight...i'd just leave it.......or throw on a 2/3 DJM kit. And you can get 4/5 DJM kits with low miles used off rps.
Hoped I helped.
'01 XLT disguised as a '03 Fx4 Level II
Big. Loud. Slow. Bright.