1. so in the end they decided to swap them back or they just keep visiting each other?

2. would not be better solution to somehow move together nearby, the rich guy can manage that for sure and they can live not far from each other like one big family in the end

3. did the nurse really swapped them intentionally or it was just convenient cover up for hospital since it was already beyond possible punishment?

personally i don't think I would swap back my child, who cares about blood, what matters are those six years you spent with your child, no matter if it's biological or not, the look is not so important, what matters is how you raise your child in what enviroment and not genes affecting his behaviour