As a Physician I am optimistic that Mike's condition will improve, especially with continued proper medical care and PT.
Currently, all three acute medical issues should be fairly easy to address with appropriate medications and monitoring (if the proper diagnosis was made in the first place; eg.-the bacterial infection(s) has/have been identified and the proper antibiotic has been chosen based on the isolated organism(s) and antibiotic susceptibility testing).
Once the acute issues have been solved, Mike's underlying condition, which most likely caused the major medical issue in the first place (?), needs to be addressed, as well as his continued PT. In proper hands, I have no doubt he will get better. Especially with his strong will and great family and friends.