Let them all know your concern with utility usage / water and obviously any unit with more that 1 person is using double the water.. so anytime you can rent to 1 person only the better.

If the rental space was physically part of the living area of your home, such as a spare room used rental room, the rental usage doesn’t affect your gain/loss calculations and will qualify for the full exclusion given the seller meets all other requirementsIf the rental space wasn’t within your living space, such an duplex with its own entrance (and kitchen and bath), or a working farm with a farmhouse on the property, then you have to take into consideration of the business use and you need to make separate gain/loss calculations for the business and residence portions of your property.

Sample Usage

If the 50% rule is inappropriate here, I'd like to know why.Oh, but you're PREDICTING the end of CA real estate. 

My Section 8 tenant's daily water usage ranges from 50 - 600 gallons per day.  

He is assigned an certain area that the data collection department determined is either a dead zone or an area requiring more antennas (places where calls frequently drop because usage exceeds capacity of site).

One of the interesting things Steve has explained is that the system learns the water usage/movement patterns, and flags changes, etc. 

Another site is SocialServe, it is used in some areas exclusively by some local housing authorities.The problem is that if you look at internet usage statistics for those that would qualify for Section 8... not very promissing.

Also, would it be totally inappropriate to ask the homeowner about his credit score?

Luckily we don't pay usage for water.