3.5% Down Rent Investments

[Christian Morrison]

So I want to start making offers on some houses around town for rent investment properties. I'm not too brushed up on how mortgage loans work. I've heard of this mystical 3.5% rule tossed around, and was wondering what the deal with that is? So I can get a loan for mortgage (for buying a rental investment property) for 3.5%?

Thanks in advance!