Anna, before you purchase any land you will need a "Perk" test. It is to see if the land/soil conditions are acceptable for a septic system. If the land does not pass there are other types of sewage systems that can be used, but more costly.... This test does cost- but I'm not sure of the amount. My daughter and sil bought some land and had a double wide set there(used one) and later found out that the landowner had known that the land would not pass the Perk test. They were stuck with 3 acres... and the house had to be moved to some other land they had!

You are wise in checking out all of these things first!!