Fascinating thread to which I can make no constructive contribution, except to say that having had three trial lessons at three different establishments I went for the one where I felt the chemistry between me and my prospective flying instructor was right – ignoring available aircraft, travelling time, price and the rest. In the event I did not regret my decision despite having opted for the most expensive establishment.
As for FFF’s option 3 and/or 4 I think I might perhaps include a Night qualification, just to keep the interest alive.
I am sorry to say that equating quality people with well-off people makes me wince, but that’s just me and never mind. Interesting contributions all round.