Our department of tourism once had a program for cheap tourist accommodation. It involves private citizens who are willing to rent out a room for the foreign tourists. They have to register with the department for proper screening before being added to the list of accredited lodging option for tourists. One experience from a friend was a good one because the tourists were kind of generous. Another experience was not so good because the tourist was a family that loves curry... they don't like the smell of that in their house.