Depends how are you have to go. I had <> 1800ft of waterline. Installing your own electric wire will save <> $100 per ft. If I had to do the waterline again I'd just hire it done, it would have been much easier and cost about the same.
I rented the equipment from Ohio Rental in Mt Vernon, some stuff I got from Delaware Rental, and I found that if you are really gonna put hours on a Skid Steer you should rent from Sky Rental down in Westerville (they don't meter the run time, hehe)
As for doing the actual trenching its slow work and the dirt up here has nasty large gravel (1 ft dia and bigger) every few feet so they gets annoying.
If you have wire that needs put in the ground and doesn't need to put really deep I have a sub soiler attachment for my tractor that makes that job very fast. I ran a 10ga 270ft long power line to my observatory in about 1 minute.