That's exactly right. Don't try to rebuild Rome in one day. I'm still finding wear parts to replace on my Scout after more than 16 years of ownership, although the list is getting short. Most recently I discovered that both front stub axle shaft u-joints are extremely sloppy and ready to fail the next time I engage the front axle. They're most likely original equipment. I'm not upset about it. I'm in awe of how well they've held up to the abuse that not only I've subjected them to, but X number of owners before me. So they need to go bye bye. With those shafts out of the way, that's the perfect time to get at the upper/lower ball joints, which again in my case have likely been in there since Moses was a kid.
That isn't to say that I haven't sunk a bunch of cash into the thing over that time, but many of the expenses have been in terms of upgrades and modifications that were more important or exciting to me at the time than replacing boring, worn out parts that still had a little, marginal life left in them. Maybe my priorities were out of whack in some cases, but I wanted to have some fun with the thing and be able to do go some places and do some things that wouldn't be quite so doable with a bone stock Scout.