taxation on passive rental income?

[Naeema R.]

Hi all, I am a Canadian living in US on a TN visa. I own the home I live in and am thinking about buying another 1-2 homes for passive income, utilizing a management agency. I am trying to research the tax implications of doing so. 

Specifically I am interested in how to avoid the 30% rate on gross rental income, as well as learn about taxation upon eventual sale of a property, and what I would have to know. 

Any info you can share would be appreciated! Thank you!