This is positively doable concept and the over reach can be beyond slums well into rest of the urban areas.

Hi Shane! Thanks for your comment.
I will search for similar projects. I am sure there would be similar ideas floating around. Will have to do my bit of research.

Dear Sarah, thanks for your comment.
I do understand that a large number of people would not be having a permanent place and yes this would not benefit them. However across the globe there is a fairly large population living in slums on a permanent basis. This idea is targeting them.