Genetic testing

So I’ve decided to do the genetic testing but insurance isn’t covering it so will end up being like $500. If everything comes back negative all is great but if not how much am I looking at to do the extra testing? I know I’m getting ahead of myself but if it is something that is going to break the bank I might just hold off on the whole thing vs having a high risk prognoses on the other two chromosomal disorders and never being able to find out for sure.