Oh thats convincing...
Even extremely high quality vehicles like Toyota have system repair cycles, when considering buying a 20 year old truck knowing its good to know when they are required. Like in any community tribal knowledge is paramount. If a would be buyer starts to add in upcoming repair cycles to the price of FZJ80, I think they could easily see double it in near term ownership cost. In the Northeast Land Cruiser & Toyota club, FZJ80s are pretty much considered parts or project only trucks once they breach 200K miles; worth about $2 to 4K depending on rust (sure full locker package retains more value). Why? Because the HG is at end of life and it a $3K fix. I've see A LOT of guys buy an 80 and join the club and gone in 18 months, all due to the cost of ownership. I currently own two 80s and one 100, all for different reasons; I know their strengths and weaknesses. For cost of ownership, comfort, and towing I own a 100.
Again, there is a lot I agree with here. But I don't consider a 200K FZJ 80 at the end of its life, and clearly many others agree. Like anything else, they will wear out, but there are many people driving FZJ80s with well north of 200 and 300K on them. I believe they were designed for a 250K service life, so the closer you get to that or exceed it, you are on borrowed time. But I think that is separate from the HG issue. The HG issue is more of a design or production issue that effects a small number of LCs. I don't believe it is inevitable, though the odds probably go up a bit as wear puts things out of tolerance. But if I had a 250K LC, I would be more worried the rings were wearing than I would the HG, which has lasted 250K, would go out.
I also don't disagree that you need to take costs of ownership into consideration as much as purchase price. Whether you get an 80 or a 100 series, if you aren't doing your own maintenance that purchase price will be nothing compared with the total cost. Whether it is knuckle rebuilds on a 80 or timing belts on a 100 series, both will be super expensive if you aren't doing it yourself.
As to the 80 versus 100, the 100 would certainly tow better and frankly is a better overall vehicle for 95% of people out there. But the initial purchase price puts it out of reach for many. And like the 80, if you aren't going to do the maintenance yourself, initial price probably doesn't matter.
But if your budget is $3-4K, I think the 80 is a great choice given the OP's desires. Ideally, a 100 series may be better, but that isn't in the cards at $4k.