I whole heartedly agree with muggins. anyone daft enough to give a large bundle of cash to a flying school almost deserves to see it disappear! (sorry to those of you it happened to but.....)
You're thinking far too simplistically about how much it will cost to learn. You will not get 2 lessons a week. You will be messed around by any number of factors - weather, transport, third parties, the 'school' losing your booking (or giving it to someone else, the a/c going tech (or not being available because of maintenance). Or the instructor not being availalbe or the 10th instructor you've had wants to repeate something. Just about everyone of these things will increase your costs.
You'll end up having months when you haven't flown and then having to re-learn those skills - and hopefully you'll have weeks when the sky is blue etc.
You would be much better advised to visit the places you are talking about and take a trial lesson with each of them - an 'expensive' lesson with a good instructor is going to teach you an enourmous amount more than someone simply hours building before they get the job they want.
It seems a very long time ago I went through some of this and ended up at Tayside alternating between 2 very good instructors. This is not a plug for Tayside, it is just that at the time they had the instructors I got on best with. It is very interesting to calculate the totals but what you really want is an environment that really teaches and you get on with. After half a dozen wasted trips or days the money will become much less important.
And I say that as an adopted Aberdonian!