I would take a look at this recent thread especially if you have no experience with spraying trees or picking trees to plant that have disease resistance. There is a learning curve especially with stone fruits like cherries and peaches. It covers spraying trees, picking disease resistant trees and some of the other issues you will face. The initial poster is in the same situation you are in.
I think you will find my second post in the thread to be especially useful as it gives a general overview of picking trees with disease resistance and how spraying ( and its alternatives) work.