How do you guys calculate a "good" commercial deal?

[John Lee]

Hello BP,

Excuse my ignorance, because I do mostly single family rental investing. It's pretty straight forward, because I base my numbers on the ARV, purchase price and repairs. But, how do you guys compute a "good" deal for 5+ units? I only hear people say that its based on cash-flow, but there has to be other factors included! A good book recommendation will help here too...