I have no idea what to say in this case.....
There is both god points and bad points in this....
Students who are financially struggling are getting cheap price accomodation..... but at the cost of risking their own health... and may be their status.....
The person who is lending the house may also be..... either way... helping .... financially getting benefit.....anything....

BUT anyway sorry to hear that our own brothers are forced to live in such dire condition.....
I know how it can be on the first few months or even a year when you come to foreign country.... My heart goes for all those students....