I've been interested in multi-family in a while, myself. Depending on what you mean, returns aren't necessarily bigger. For a duplex, maybe you'd do well. But if you mean apartments, I can't find any apartments in my area that offer the return I can get on SFRs. I do have 2 duplexes and they are find. But my SFRs often have a 10% better ROI than what I can find in apartments.
Also, be on the lookout for places you make permanent improvements on for an increase in value. A 3/1 with 1600 sq ft probably has space for an extra bathroom somewhere. I've seen 1600 2/1's. Yep. There was no only a good place for an extra bathroom, but a room that, with the addition of a closet, could be considered a bedroom so my 2/1 could be a 3/2. (I didn't get that deal, though.) My agent is also my property manager and he used to do flips as well as have his own rental portfolio, so he can tell me what it would cost to fix things and what they can rent for. He said, assuming we can find a good location for it and the house is on a crawl space, we can usually add an extra bathroom onto the outside of the house (if we couldn't find room inside) for $5-7k. A slab is a different story though. ;-)
Another thing to consider is where you are buying. If you are buying in your area, you already know the good and bad locations. That's important. My agent says he won't accept a rental, thus won't sell me a property where he's afraid to go collect rent alone at night. He runs mostly Section 8, but not in the dangerous areas. A lot of new investor's buy in bad areas, then as they grow and learn, have trouble unloading those properties in favor of better ones. Now, some people target bad areas. They can be a great source of income, for sure. But it's headaches I don't want. Just be sure that's your well thought out targeted plan if that's what you buy.
I invest out-of-town, though in my hometown and a nearby town, so not places I'm completely unfamiliar with. It's a giant headache and if it's doable, I totally recommend folks start locally so you know what your strong and weak points are, what you need to keep an eye on in out-of-town investments, what your strategy really is (often not what you started out as), etc. Iron out the wrinkles before you take your money someplace you can't keep an eye on it. ;-)
GOOD LUCK! Exciting times!!!