As above, in the UK you're looking at getting an FI(A) rating. The title is misleading as CFI (certified flying instructor) is the American term for a general PPL instructor, in this country a CFI (chief flying instructor) is the boss, with loads more experience and responsibility than the position you're looking for.
The cost will be far more than £10k, you're looking at that just for the PPL(A) really, then you have to build hours. If you want to add the FI(A) to your PPL(A) you need 200 hours, or you could do a CPL(A) instead, which from the onset will be about the same cost.
So you're looking at:
the best part of £10k for the PPL
Hour building and/or CPL about another £10k
FI(A) rating £7-8k
So I'd back up Level Attitude's estimate of around £30k for the lot.
The trouble is that the market is full of people who DO want to work for airlines, and only instruct as a stepping stone. Therefore, the market only pays what it needs to, which is very little. Typical is around £20-£25 per hour flown, averaging around 50 hours a month, so lucky to gross £15k a year - and that's working at it full time 6 days a week.
Most schools tend to keep you self employed, so you can freelance around if you like, but it means that you have no holiday or sick pay, no pension, in fact no benefits at all.
Once you have some quality experience, and can teach night or IMC or something else you may get lucky and find a school that will pay you a salary. I seem to remember goodwood looking for a Chief Flying Instructor with some decent experience, and were willing to pay decent money, so there are a few good jobs out there, but most people pass through instructing as a 1-3 year stop gap before their airline job, so most jobs are paid accordingly.
Last edited by RTN11; 3rd Sep 2013 at 19:47.