Rob,
I wish you only the very best of luck with your cunning plan!!!!
As for age, my old instructor may he rest in peace was always of the opinion that you could never be too young. I started with 17 and it all really just snowballed for me from then on. I think though I was rather lucky.
The only thing I can add is make sure it's a quality school and have a look at their pass rates.
Also have a look at gapan.org they also sponsor people plus they have wealth of knowledge.