I maxed out my conventional rental loans when I had around 20 units, and that was basically hellish. 

I beg them not to beat the **** out of the house.. they could do whatever they want to the suspect preferably send in a Canine unit  Yeah, go into a house that's had someone decomposing in it for a few weeks and you find out what real putrid smells are!

I bought a house that I split into 2 units and converted the shed into a tiny house.

I am not able to locate the filter for multi unit properties.

When you say your house hack phase has passed, are you saying you DON'T plan to occupy a unit of the 4-plex?

This maximum rate is determined by adding 2.50 percentage points to the yield rate on long-term government bonds as published by the Federal Reserve Board or the United States Treasury, or both.

Investors focus on adding Accessory Dwelling Units (ADUs) to increase income streams.

Just in the last 2 years, PadSplit has doubled the amount of units on the platform thanks to hosts like you. 

How many units are generally in a townhome development?

When speaking of a strictly commercial loan that is a different animal as is not 2 units purchase first time buyer which @Thomas Lebens states he is.