If you are interested in a well, and I personally have one, keep in mind that you will have to do maintenance on them….
Dug Concrete Cased wells should have the water tested probably once every six months. If there are coliforms in the well, then you will need to clean and treat the water. If that is an ongoing issue, you may have to purchase a treatment system. There are a variety of treatment systems out there that are effective and should be considered.
Dug wells have more issues typically because they’re shallower than drilled wells and so often have surface water as part of the water that goes to your house. Sometimes they’re deep enough to have access to an aquifer.
Drilled wells usually require less maintenance but you should always be aware that it is important to maintain your wells.
And when you buy property, or if you need more information about your current well, I will refer you to well experts to examine, test, run flow tests, and recommend the best treatment systems for your well water.