Rule Number One:

"One, Two, Three, Four, Five, Six, Seven." "Hey, why are there so many residents in your house?" "No, officer, there are only eight over here, including me." "Are you renting your rooms to them? Strictly NO renting of rooms!"

Why no renting of rooms? Will it cheapen the image of condo? Yes it may but not as much as you think they may. If you want to rent rooms, why not buy a building to rent rooms? You can even buy a HDB flat and rent it to someone else.