Students can live in  Humanitas seniors housing for free. All they have to do in return is spend 30 hours each month being a good neighbour.  https://inhabitat.com/dutch-housing-model-lets-students-stay-at-a-senior-living-home-for-free/

And here is a report on this Intergenerational Housing Initiative

https://www.tandfonline.com/doi/full/10.1080/02763893.2018.1561592