okay, just saw this repsonse, so I will keep my comments to this thread going forward.
So if she has income of more than $4400, she can't be your dependent, so that case is closed.
have you assessed her eligibility for the Marketplace with this tool?
https://www.healthcare.gov/income-and-household-information/income/
note that foreign income is exlcuded from MAGI when assessing income for Marketplace eligibility.
Marketplace participants are expect to work in order to receive the premium subsidy (why would the government provide a subsiday if the person wasn't paying taxes???) . Under a certain income, Medicaid is what is available, if eligible. Otherwise, I suspect there is the private insurance market.
