Husband and I are in the process of buying something

My husband and I are in the process of buying something,an auto salvage yard.Neighbors and the owner is going to retire.We are in the process,we have the money already and an epa test was done,clean.We doing this through a land estate lawyer and he is paying for this part.Now is finalizing it soon.His son is not going to like it,he is a spoiled brat and not going to get what he wants once we take over