What ratio to use in property cost vs revenue

[Jesse Lentz]

I read a lot of different ideas about what is a "safe" buy in real estate. I am looking to purchase my first multi family home. My thought was that if I could get a 2% property (if house costs 100K, need 2K rent revenue per month), that would be a good deal. Any thoughts on this? Is that too unrealistic of a number or should I pursue only if that is the case. 

Thank you,

Jesse