Takes a little longer to close and can be harder to get a seller to accept it when you have competition, but to you the borrower, not having PMI with 0% down is a simply massive boon for you and your cashflow. 

I need to find out what the massive multi-family property managers use...

@Caleb Rigby Warren Buffet has 3 rules which all reiterate don't lose money, however, they weren't major losses. 

Warren Buffet said something very plain but profound - "Don't lose money rule."  

If you're one of the vast majority of Investors who's been "Asleep at the Wheel" and are discovering the massive Equity Savings available to consumers thru REALTOR REBATES, which the U.S.

I make darn sure that have the flexibility baked into my plan so that I can take as long as it takes to buy a deal that makes sense and moves me toward my long-term goal of building a sustainable, massive, passive real estate portfolio, one property, and one year at a time.After that next purchase, it will be back to working hard at my career and other professional pursuits, and combinging my professional earned income with my passive income from other real estate investments to buy the next, larger property 12-18 months later. 

I could get a bridge loan for 6 months until I can HELOC the house and pay off the bridge loan but why would I want to incur massive fees like that when there are easier methods to achieve the same goal?

We're talking about investors with massive portfolios and/or capital here, who pay with cash then refinance their money back with appreciation and just hold onto the asset. 

Believe it or not, I went on a massive buying spree the previous two years.

I would do something like this ONLY if you were positive that there was massive appreciation heading your way.