What is the "Quadplex" of Commercial real estate?

[Victoria Townsend]

What is a good starter-type property for someone looking to get their feet wet with commercial real estate? Like a 12-unit apartment building? Or like a warehouse? etc. Looking for a type of property that won't make me feel overwhelmed and would help me understand the numbers side of commercial a little better. Basically, I'm interested in what people would recommend to look into for someone just starting off in commercial real estate rentals.

When it comes to smaller residential properties, I think most people know how much of a fan BP is about multi-families (with quadplexes being the most common example). Now I ask... what is the "quadplex" of commercial real estate, if there is any? And what are some things to be aware of with this type of rental?