[updated as of 10 September 2010 with Eco Home/House and Highland Castle Information]
Here is a table containing the rent values and the number of tenants each house/residential building can hold per contract.
PS... the amounts in RED do not make sense at all. These errors might have been caused by a bug which the game developers of Millionaire City haven't found a way of fixing yet.
[Bungalow, Bungalow Luxury, Townhouse, Townhouse Luxury, Duplex, Duplex Luxury, Three Story, Three Story Luxury, Apt. Block, Colonial House, Apt. Block Luxury, Villa, Loft Block, Villa Luxury, Skyscraper, Loft Block Luxury, Chateau, Futuristic, Skyscraper Luxury, Super Skyscraper, Eco Home and the Highland Castle ~~~ Please click the photo below to enlarge]
Happy playin' everyone!