Buying a 4 unit property vs. 5 unit

[Darsh Patel]

Hi everyone, 

I've heard that buying a 4 unit multi-family still qualifies under conventional financing and basically follows the same rules as buying a SFH. But, I'm curious because I am currently looking at purchasing a 5-6 unit property. What happens when the property increases to 5 units?

Is financing different? ie. No conventional financing? Do I need to worry about different legal issues? Any help is appreciated. Thanks!