Inquiry house hacking

[Nakia Addison]

I now have a consideration for house hacking. The reason I'm open to this option is because the market that I reside in is currently above my price point criteria. 

Question1: Is there a cash flow criteria for house hacking?

Question 2:Are the primary startegies for house hacking is to live rent free while owning a property while landlording?

I'm asking because I've done analysis on a few multifamily properties and cash flow wasn't ideal but the mortgage would be covered by the tenants. 

This lead me to question 3. Are all utilities considered to be covered by tenants?