How will he pay for the care he needs when he doesn't have money. True that he should have started acting on this ages ago and not wait till 90 but still think selling gives him more financial freedom. Medical bills might become a problem too with this age.
Talk to your lawyer that you want to have sole custody of your child, so it will be legally sorted. Then you can ignore her when she is standing in front of your house and refuse to give her access.
It isn't as simple as stated here if you don't read the link in the article: Long time Danish resident stuck in Thai immigration detention in complicated case - Scandasia
It doesn't say that at all. It says Foreign sourced income before next year will not be taxed.
When you bring in money next year = Foreign sourced income, it will be taxed.