This will only hurt the housing market and economy. People wont rent extra rooms or units in their homes.
MANY people have to rent rooms in their homes for financial reasons, many people get divorced wife keeps the home but cant afford the payments herself OR visa/versa they no longer have the 2 incomes so they rent out rooms!!! I know many people in CA. in this situation, I have also found senior citizens rooming together because spouses pass away!! This is ridiculous!!!