Integrated schools are going to cost you between £70-80k, plus interest on any bank loan.
If you go to a modular school, you will probably do it for around £40-55k and be able to train when you want; so if you find nearer the end of your training that the economy is still poor (i.e. no jobs) then you can delay it and allow the economy and recruitment to pick up.
You need to remember, there are HUNDREDS if not thousands of pilots waiting to join the airlines because of the lack of jobs. If you finish your training quickly you'll just end up at the back of the list.
Take your time, enjoy your flying and prevent yourself from taking on any debt and you'll enjoy actually keeping your salary every month rather than paying it all to some bank.