So, I'm not sure what your current custody arrangement is, but if she's moving father away, will you still be able to get him to his school when he's at your house? Could you resolve it my taking him Thursday after school and through every weekend (making Thursday night the only weeknight that he's not home?). What do you think your son really wants?
And yes, it is a pain having to still have all this contact with her. Since you will be off the hook for alimony soon, try to pick your battles on the other stuff.