Joe,
I second the response of flying doctor. I knew of a dentist in Alaska who would fly himself and his nurses to remote villages in Alaska where they desperately needed his quality care. In his plane he somehow had most of what he needed and brought much needed care to these people. I'm not sure exactly how he was getting paid but he lived in a nice house and got to fly all the time. It could be a way to still be a professional pilot but earn a more stable long-term living.
That being said, the only advise I give anyone is not to take advise from me
You can do anything you like, and you can always change your mind. Its great that you have a specialty to fall back on no matter what happens. I'm an engineer pursuing a CFII (well, okay, I'm just about a PPL right now but I have big plans!!!) so I understand where the drive comes from.
Best of luck!
James