TBH, I would be wary of getting myself into this situation.
We have a higher than national average income, but 2 sets of fees are the main outgoing in our life. It all seemed so manageable 7 yrs ago, but dear god it can be a struggle.
Like OurLady, I hardly ever buy anything for myself and am completely fed up with my life sometimes - my fridge freezer broke down when we were away for a rare holiday.
I lost all the produce I had grown and picked (including 50lbs of plums from my tree) over the summer BUT then I had to buy a new fridge freezer!
Luckily a local charity furniture shop leant me an ancient small fridge until a fridge freezer came in, at £80 it was still a stretch but OK. I bet I am one of the few parents at the school who has to do this, which makes it sad for me and tricky to hide the 'threadbare' bits of our lives from the DC.
There are a few independent educational trusts, I know of one run by a local wealthy family but do not know the name of the trust.