Please don't get hung up on the extreme-case examples. Here is a worksheet that the IRS provides in their VITA program. https://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf
The point is that it's NOT any absolute dollar value that determines the support requirement. Instead, it is the ratio (50%) to the total household expenses. In the extreme example presented here, a million dollars might not be 50% in an extreme case where the household is some huge palace with annual household expenses in the multiple millions. Again, please don't get hung up on the dollars, and use the worksheet to calculate your own ratio. The main point is that the parent usually will retain the dependency of a child, who is in school at least half time for a semester, once the value of the parent's home is considered for the support.
