Don't be derailed but be totally and utterly realistic.
You are going to be running a business which is dependant to a very large extent on lots of good weather to enable people to fly, an economy which gives the ordinary public the disposable income to spend over £5500 on a PPL and in the meantime have a constant income to cover your overheads.
This will almost certainly mean running a bar, continual social events therein and employing staff to do it.
Income from flying has to cover the cost of renting or buying premises, owning/leasing aircraft, maintenance, licensing costs and employing at least one full time instructor but probably two. Then there's the matter of what you are going to pay yourself. Realistic annual running costs for even the most basic of organisations must be approaching £250K.
Sorry to piss on your chips, but in 30 years in aviation, I can't think of a worse time to enter into such a venture.