Why spend a small fortune on an International School in Bangkok but at the same time plan for your Daughter have a "career" in Thailand? She'll earn maybe Baht 20,000.- a month at best and will have no real advancement prospects - there are just SO many negatives to your idea.
My daughter went to ISB and is now earning a very high six figure income in UK (GBP 6 figures that is).
Yes I realise that Parents want to keep their children close and that will be a major reason for you and (especially) your wife to concentrate on keeping her here, but believe me she will not thank you for limiting her future in this way.
"The UK state pension has been revealed as one of the worst in the world. Among developed countries only people in Mexico and Chile can look forward to a relatively worst retirement payout."
British workers will have worst pensions of any major economy
"The typical British worker can look forward to a pension worth only 40% of their pay , once state and private pensions are combined."
And a UK Expat with any pension entitlement doesn't get that as their pension won't get the cost-of-living increases.