Don't want to be that guy but I'm pretty sure the military wouldn't take someone that obviously disabled. It's a money thing. How would he even get through boot camp? He wouldn't be able to use his exo suit. Now, some kind of secret service might, depending on what he brings to the table. Or you could have him join before the full on deterioration hits him - in which case the military would be obligated to keep him on board and give him treatment.