This reminds me of my sister and BIL's ex flat mate. They lived in a big 6 bedroom share house mansion type house, sharing with lots of people. The guy who was on the lease basically 'ran' the house, and collected all the rent. He charged a certain amount per room, but the total paid by all the people added up to more than the rent for the house....so he not only lived there for free, he actually pocketed money each month!!!