Hi SBAB,
having 1000000h on a cessna will not give you more chance to get a job."Oh, that s nice, you have 10000h on the c152, but here we fly Boeing, and I see you do not have jet experience, next!!!!"
You can be turn down because you have to many hours, and many bad habits.I know, this situation is stupid.
what you need is a contact.In the USA, you have thousand of Flight instructors looking for a job.
and after building time as a FI? what else they will ask.I have over 2000 hours, and no interview in my agenda.They want captains, or FO with lot of experience.