You can't have got through 12,000 hours experience without hearing the adage,
How do you make a small fortune in aviation?
Start off with a large one.
Good luck.
Not wishing to put a dampener on your plans, here's a few things you may not have considered.
and have very close cooperation with ..., the CAA
This made I laugh ... you do know they are called the Campaign Against Aviation? They are a very different animal to the FAA.
You may need to consider links with a JAA/EASA flying school for the IR part as that has to be conducted in JAA/EASA airspace.
Advertising and marketing will need to be targetted carefully; website, attendance at careers fairs, as well as traditional ads in mags.
I hope you've got good business acumen and a lots of cash behind you.
As a matter of interest, what is your instructor experience as to begin with you may also have to do the teaching as well.
Cheers
Whirls