I, too, along with many on here, have a love-hate relationship with my CUCV. The love for me is from having a big green military Chevrolet that is relatively easy to work on. The hate is from having a Chevy that is underpowered, old and prone to unexpected failure. Add in the obsolete and unavailable parts, 24v weirdness and it can be a pain.
But for someone starting with almost no mechanical experience to speak of, this has been an ideal truck to learn on . The parts are cheap when they're available, and there's a ton of resources for K5 owners and vintage Chevy afficionados.
Financially, it can make sense if you look at it a certain way:
-It's paid for. I'll never have a credit collector call me or a repo-man threaten to take away my transportation due to a family hardship. You get to take home a titled vehicle for the price of a down-payment on a new truck.
-If I put a cheap car payment's worth of cash into parts and maintenance each month, I'm really not having too many reliability issues. Think about it: how sweet a ride could you make your CUCV if you spent $200-300 a month. But most don't. They just want to drive the pi$$ out of a 25-year old truck without taking time for upkeep.
-In addition to the money, this truck requires a time investment. It's old. For me that's part of the fun; it's a hobby just like mountain biking, hiking, and motorcycling. Owning this truck is also an exercise in character development. I consistently am tested in my patience as I encounter sometimes very frustrating situations with the beast. That's how we grow.
-There is a pride and sense of accomplishment when you've taken the personal time and financial investment to buy something old and beaten down and make it "new" again. To know that you took something discarded, then you've sweat, bled, and cursed, but ultimately ended up with something that you really enjoy, and that others envy.
There are better 4x4 diesels to be sure. But for someone who's thrifty and resourceful, enjoys a challenge, enjoys working on vehicles and loves the military despite it's obstinate trend toward sadism in all it does, these are really hard to beat.