"Though I would suggest looking into this strategy: Buy your primary first, with the primary lower interest rates. Live there a year, then rent it out. Buy another primary, with the primary lower interest rates. Live there a year, then rent it out. Buy another primary, with the primary lower interest rates. Live there a year, then rent it out. You get is gist of it! Just buy every primary with the "rental" numbers in mind and it will work out. Though I assume the banks will still ask the same questions above when acquiring any additional property."
We basically are just following the method you mentioned above. But the variation is we live in the primary residence for more than 2 years, to save on taxes.
2010 - bought #1 primary residence
2013 - bought #2 primary residence
2013 - 2016 - rented #1 house
2016 - Sold #1 home - profits are tax free if you have lived in the house for at least 3 years of the previous 5 years
2017 - Will be buying a #3 primary residence
2017 - rent or sell #2
So far it has been working just fine. And did not had any issues with the banks, and we have been getting our loan from the same federal union for both the houses and are preapproved for 3rd one by the same bank
And other thing to keep in mind is, you need to space out your selling primary residence at least 2 years to keep the profits tax free