Witching isn't all that hard. I've seen it done two ways.
#1, the way I would try. Cut a green piece of wood shaped like a Y. Hold it so that the single point is facing away from you and parallel with the ground. It will bend down and point to the ground when you go over water. Not sure if the type of tree used matters, but it must be green, and probably not much bigger than a pen or pencil
#2, the coat hanger mentioned above. Two pieces bent into L shapes. Hold the short end loosely, with the long end facing away and parallel with the ground. The long ends will pull inward and form an X when you are over water.
Sounds dumb, but I've seen both work. My grandpa witched my uncles well across from my parents. It has overflowed several times, usually 2-3 days after a decent rain. A few years after that, my parents well dried up. They followed the vein that my uncles well was on until it crossed the road and came onto my dads property. It is quite a bit deeper on my dads land, so there is no danger of it overflowing. But there is more than enough water for one house.
The reason I asked about the cost is because the community well I am on has never charged anyone for water. I have only been here 11 months, but apparently the guy who's land the well is on has just been paying the power bill himself for the last 10+ years. Well, now he has gotten himself into a mess, behind on a lot of bills, and the power was cut off (he paid and it was back on after a few hours). I understand he is tired of paying for 5 houses use of the well, and he wants someone else to take responsibility for it. I was unsure what to think of the situation, but after a couple of emails to the register of deeds, I have found the legal documentation I need to protect my interests. And as bad as I do not want to be responsible, it looks like I am going to have to take it from him. Hopefully I can convince my neighbors to do it, since I am gone from home 12+ a day for work and will not be as easily accessible on a weekday.