Limit to house hacks??

[Austin Fruechting]

My uncle wants to get together this evening. He's looking for some guidance on how he can carve his own "good life in ten" path.  He would definitely need to house hack to start out. 

Can you house hack every year and buy another with 3.5% down so long as you have lived in the property for at least one year?  Any other stipulations? 

Thanks for helping me help him!  I've always been aware of the principle, but have never used it. I have also used the same portfolio lender from the beginning so I just want to make sure I'm providing my uncle with correct information.