Breakeven point for a small multifamily (Duplex-4plex)

[Wei Jie Yang]

Question about buying Multifamily properties. Is there a general rule of thumb in regards to breakeven points when it comes to small multifamilies (Duplex-Quadplex)?  Something like I a Quadplex is only a good deal if 50% occupancy gives me a breakeven operating number. Or avoid Quadplexes if I can't make a profit unless it's 100% occupied. 

Do such guidelines and rule of thumb exists?