With USDA and VA loans you really need to pick out a home that qualifies for the program. Sounds like you are out on acreage if you have a private well. These programs are really more suitable for homes in town on a smaller lot. As to well you can go to the department of water resources site for State of Idaho and look up the well log that should have been recorded with them when the well was drilled. They need to insure the water well is to specifications and has sufficient volume to close your loan. This should have been reviewed when you did your home inspections in a normal transaction. The well log will be under the owners name or by legal description. Good luck with your transaction.