That is the typical "family plan" around here, with parents instead of the government. :-)
Some states do this, with developers, requiring a percentage to conform/ be available to this funding format.
You end up with one condo building out of five being a bit more cheaply built, with less green space, and not great neighbors due to the concentration ( if only 10% of the persons in this scheme are bad neighbors, and you group 100 units together, you have 10 bad neighbors and 80 who have given up caring for their area so much after living near those 10.). These units also have a maximum that they can be resold for, to keep prices low/ subsidized for the next owners who qualify.
I guess if it not tied to a specific housing project, and home owner and investor alike can win, it can work well.
