Most of the modern world was built on the of ROI, industry and investing in the future to better one's life and family. I don't see what correlation it has to low income housing or anything else. Housing will always be a thing of value which people with invest and trade in.
As long as there's people who want it there will people willing to build it. They can get a valuable return, even if it's a modest one, but making those buildings. The interest isn't the problem.
When you artificially constrain supply and massively increase cost/risk of those investments then the only buildings that get built will be expensive ones where the margins are higher. While simultaneously reducing construction and related jobs, reduce utility of a limited supply of land, significantly increasing the cost of living for people of lesser means who still need to work where the jobs are, create urban ghettos by only allowing gov to the feasible creator of low income housing in large centralized areas. It's not rocket science.