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Thanks for your input npc. Yes, the male chart DM depends on whether you correct the hour pillar or not. IF Xin DM, then Mao is indirect wealth.
I'm not ever predicting parent's death to the children, this is purely a theoretical contemplation. These are my own children. And yes indeed, my daughter is a weak DM's with both possible hour pillars, so I'm guessing she will need elemental help from luck pillars to handle her wealth. My son is a balanced DM if he's considered Xin chart - but otherwise a weak DM.
To determine the proper hour pillar then requires the location of birth, but understand if you don't wish to give that info out.
Assuming your son is the Xin chart, I would still consider it weak. He is born out of season and his metal doesn't have a root. At first glance, it does look like the sheer amount of earth should strengthen the dm, but it creates the issue of 土重金埋 (too much earth buries the metal) instead.
What this means is despite being a weak chart, 2 of his 3 favourable elements are similar to a strong chart - Wood to break up the earth burying his metal, and water to wash the Xin metal/jewelry. Metal is a good supporting element that gives his Xin metal the strength to dig out of the earth.
The reason to possibly look at it as a weak chart requiring "medicine" that's different from the standard prescription of resource/peer elements is that the psychology of a weak dm is different from a strong dm, so how they manage issues is different.
Does he achieve his best results when resources are provided for him, or does he step up and truly show his power when he is forced to figure things out entirely on his own?
Does he thrive and become highly disciplined when placed under strict rules and authority figures? Or does pressure and strict authority cause him to withdraw and lose his motivation?