If the calculator comes up with $659 then that’s the number. Of course, I’m assuming you want control of the insurance to drop the number too. Be sure your work isn’t seasonal, or that your company is on a good footing, because ultimately you’ll be responsible for keeping the insurance going. Is it better or worse coverage?
Everything is relative. If your incomes are high, then $659 is par. Some of us pay $200, some much much more.
I read on this site that expenses incurred in visitation are not counted.
As for the smoke, if you can prove this, I would say that that is a valid point to bring up–but you can’t compel him to find a place of his own. You can compel him, however, to find a safe place to visit with your son. Maybe he can come and stay overnight at a hotel in your hometown until he finds a place of his own.