I've done it in the past with a 4-plex. All the work and pains aside, I wouldn't consider it unless you're numbers were way better than that. They'll do stuff to lose their HUD voucher and then you're stuck constantly trying to collect rent or dealing with the eviction process. No matter how hard I worked at it, I always seemed to have one of the four units not producing. So essentially 25% vacancy rate even though they were rarely empty. Luckily, rent was over 3% of purchase price so I still did ok. But I'll never do it again. Expect way more to go into maintenance than a normal property.