Large Multi-Unit property financing

[Joe Kelepolo]

I have owned rentals and flipped a few houses, but when it comes to large multi-unit properties I have zero experience.  What should I expect the process to be like if I were to buy a multi-unit property for example at $500K?  Would 20% down be sufficient?  If I used $100K from the equity in my home, is that allowed?  How long does it normally take to close?  I have also heard that it is possible to get financing to reimburse the down payment, is that true?

Thank you!

Joe