Actually in the USA there are programs for help. When the number of people in the house increases but the income does not you can apply for food stamps/SNAP/EBT. Also there at some point will be medicare or medicaid to assist with health related costs which can even cover a in home CNA. Then there is respite. Every state offers it in one way or another to give you a break from caring for who ever you care for. It usually amounts to 16 hours a month or 4 hours a week. It's not to replace medical care, but more like a sitter. Then if the parent is aged or disable there will be SSI or SS checks the parent will be getting monthly. So all in all food gets added, medical, sitting, and a monthly check. That all put together in a home that already has one income should be very manageable. If there is no income in the home then Section 8 housing is an option. So that the majority of rent is covered by the state.