Last TK-880 I bought didn't cost much more than a PL259-SMA adapter. In fact I passed on some just last week that were $15 each.
If I were you I would put the 880 in the UTV, get another one for the truck, and probably a couple more as backups. But that's just how I roll!
I was actually thinking awhile back that I had several TK-880s. But I started looking for them and could only find one that wasn't already in a vehicle. So I looked around for some cheap ones and bought three more for just over $20 each.
You're gonna need two for your repeater! What repeater, you ask? Just wait!
I'm skeptical about buying off Ebay but it sounds like lots of folks have good luck there. Assuming that's where you get them. I spend the extra to get a 90 day warranty and to be sure it works out of the box. I have no interest in getting 2 or more to 'make' one good one. If you find one you're passing on, pass it on to me if from a reputable seller and I'd consider it.. kidding, sort of..
Regardless of where I buy, I am leaning toward another 880 in the pickup. The UTV install turned out well IMO so will see how much use it gets this summer on the trails, etc.
Yeah, repeater. Don't need one at home, there's already two within easy reach of both my HT. I have a piece of dirt in Montana that would be close to ideal @ 5600', open with no trees or big buildings, looking over a good size town several hundred feet below and a couple valleys that stretch a long way. Closest repeater to that area is well over 100 mi. LOS and behind a few 10k ft. mountain ranges. Also happens to be at the junction of two major interstate highways. But I don't live there, visit a couple times a year only, so it would be more of a GMRS community service, if there's even a GMRS "community" in the area. Build it and they will come.
..and I know squat about requirements, as in enclosures, tower/pole, batteries with solar I'm assuming would be the ticket. Maybe I could find someone to maintain it for their group or such. Anyway..