Very laudable. I truly hope that your Thai family have the desire, and capability, to see your plans through. If they haven't got the ability and motivation (or opportunity) then the education fund will be of little long-term use. The family will make funeral arrangements in accordance with their tradition, irrespective of your wishes. Few seem seem to realise that it is their own inheritance that they are spending on monks, wake and other features of 'show'.
What you are doing is very much in line with what most of us do anyway - those that matter are well taken care of any the $10k could be spent frivolously, hedonistically, selfishly without much of a dent in their inheritance.