NT,
you are 33 years old, I suppose you have a job.
Do you want to instruct part-time or full-time?
If you want to keep your job and instruct part-time - let's say one day a week - you can do +/- 150 Hrs in your first year, get (maybe) unrestricted and make 2500 - 3000 pounds, which will pay for your MCC in year two, if you put all your FI money on the side.
As a full timer you can make maximum 18K before taxes (900 Hrs x 20 GBP/Hr) but you have to give up your current job. (Bear in mind that not all schools pay 20 GBP/Hr.
)
Count on 6K for an FI course.
You have to do your maths and research. I don't know your situation nor your short and medium term goals.
Hope this helps,
Erik