can I take classes at 2 schools at the same time if I still have benefits leftover?
Yes, you can take classes at more than one school under the GI Bill if the classes at both schools count toward your degree. Also, the school granting your degree has to consider the classes at the second school to be required in order to get your degree
how much will I be getting so I can budget?
Your payment amounts will be based on the number of classes you go to and the hours spent in those classes