Well, being a guard guy I can offer you my advice, but I have to ask what it is you are trying to accomplish. From your post I gathered that you really want to go to grad school, so are you trying to join the guard to get your school paid for, or are you hoping to get a guard pilot slot and feel that having your MBA will help with your packet? If a C-17 pilot slot is what you want then I would say don't waste your time on an MBA because nobody on your board will give 2 shits if you have an MBA or not. I would recommend spending the grad school dollars on obtaining your private pilots license which will score you many more points with the board. Keep in mind guard pilot positions are extremely competitive and if all you are looking for is tuition assistance, well then I would go enlist in any any unit that will provide tuition money at a school where you want to study and not worry about the pilot thing.