Now, at 50, with a 4 yr old son, I'm much less inclined to do so since it would take time away from him. Maybe in 10 years we could tackle a project like this together. (When I'm 60? Yeesh!) For now I suppose I'll just wheel this 4R as much as it will stand it and be happy with what I have.
Don't wait until he's 14 to spark the interest, however. My daughters are both pretty savvy on cars, having grown up watching me wrench and fix my stuff and theirs. My oldest did a 4Runner timing belt at age 14 - I only helped her break loose the hardest bolts. I paid her $40/hr labor, which got her attention to do the job. My youngest now uses checking her oil to cause boys at gas stations to run the other way - it intimidates them. Kids today....
So, even if you never buy an LC, at least teach your kids about basic car maintenance so they are not totally at the mercy of Tire World when they go in for a brake job or an oil change. They can 'help' even at age 4 - holding the lug nuts while you rotate tires, for instance. As time goes on, have them replace wiper blades or a battery - easy stuff.
Just my .02 worth - I'm still wrenching at 56 and plan to for a long time.