Married couple, both work at steady jobs, no kids at home, no bad habits, just bad with money I guess.

As a tenant I would object to this ,  if tenant  in unit 1 is a single male living alone , and tenant in unit 2 is a single mother with 2 kids .

My personal vehicle was broken into in my home laneway (kids).

Let me confirm, this is for 2 adults 2 kids and 2 dogs right?

We personally like to target business traffic, and people who are coming to area for a purpose that is related to family or work, so we make a lot of accomodations for kids e.g. putting up a tent from Ikea and colorful foam mats. 

Also, if granny doesn't have the greatest numbers, the kids will step up and co-sign a lease.

Lately Ive been reading "Landlording on Autopilot" by Mike Butler: in it, he describes giving tenants "homework."

The last thing you need is for one of your tenant's PitBulls to get out and maul some kid. 

My property manager called me about a prospective tenant that passed our application process for income and credit score - Its Grandma, her daughter, and 2 children.Grandma runs a day care out of the house with 5 kids on average - my guess is she is low balling that number. 

I would love to eventually expand outside of my local market but not without completing the proper homework first.