Hi Stuart
Going into the helicopter industry in the current climate would be brave for a family man, particularly one whose whife is looking to study for 4 years. Apart from a min of £70,000 you will have to fund for training costs, you will have to be geographically mobile to secure a job. If you are going to be prepared to move to the far end of the country at 2 or 3 weeks' notice, then you might have a chance of securing a first job once you have the necessary qualifications.
As regards where to train, I would recommend that you continue to work and do your PPL locally. Go and see several flying schools and have a trial lesson with each, see what you like but UNDER NO CIRCUMSTANCES be tempted to secure a cheaper hourly rate but putting a slug of money in their bank accounts upfront. Companies who are keen to quote much cheaper future rates to get cash flow may just be the one's who close the doors a few weeks later, once your cash has disappeared.
Find a school who have several instructors and several helicopters, so that your training isn't interupted when maintenance / availability is compromised. Above all find an instructor you like and feel comfortable with.
Very best of luck but don't expect to be easy.
CH