Thanks for your continued interest in my system Chris, it is flattering in a way.
The first question is not relevant Chris - for the answer is I am helping.
The second question - if circumstances change, then parents will have to do what they judge is right when those circumstances change. Some things are reasonably foreseeable, others are not. When something unplanned happens, they will have to adapt to this situation rationally, as best they can. Some of them will be helped by receiving support from others who are sympathetic to their situation. Such as help by charities, or from benevolent individuals.