Your perspective is a valid way to look at it.
Have you ever taught yourself how to do something only for the satisfaction of learning?
Gears are not something you want to play with unless you're planning to do professional gear work. Especially if it's a pain to get the parts overseas. I've seen gear work done poorly. The best case scenario is they don't last as long (wrong preload etc). The worst case is they break, and kill your locker. I've also seen tcase work done by 'professional' shops where the tcase explodes on the freeway. This has happened to 2 people I know in the last couple years. In one, the tcase exploded and came through the floor.
When I got my Jeep, the gears were done wrong (preload). I had a reputable gear guy look at it. He fixed it as much as he could, but advised it would eventually fail. It failed on the trail (teeth broke off) and I had to get it towed. Then found out it broke my front ARB locker when that happened.
So if you want to play, that is sure an option. Though at your own risk of an expensive or life threatening failure. If I knew you and thought you knew what you're doing, I would still rather pay a professional to do it. Even if you offered to do the work for free.