Jen,
Having no money does not make it impossible to get a multifamily deal, it just makes it extremely harder to get one done. The easy thing to do would be to go back to residential investing until you have enough money, but that's no fun. lol
Try getting involved into your local REI clubs and find investors that invest in multifamily. Understand their criteria and what they look for in a deal and then turn the city upside down to get that deal.
Once you find the deal, try to work out a partnership with the investor so that instead of flipping the property to them, you will be able to keep a small percentage like 5 or 10%.
I know the percentage don't sound like a lot of money but the experience that you will get will be priceless. Now you have value to bring to a deal because of the experience from 1 property.
Then you talk to some close friends and family about leveraging your experience to get a great return on their money for the next deal. Then it's full steam ahead! Good Luck