Some sound if rather blund advice on here. My view is that if you really enjoy instructing and want to teach, do the FI rating and you will find a post eventually. You may earn just about enough to live off, but on the upside, getting paid for doing what used to be your hobbie can't be bad!
If you are just looking for any flying job during these difficult times and wouldn't otherwise look twice at instruction, best to save your money due to the poor state of the FI job market, and look elsewhere.