How to grow with loan caps?

[Burke Ericson]

Hello, I am wondering how people grow their portfolio after they accumulate a certain number of loans for rentals. For example, some people have 100+ rentals, most of those leveraged with debt, however I know there is a cap on traditional mortgages; (4 or 10??) So I wonder how people keep the train going, how do you get so many loans? One successful person here said commercial loans, however I understand those rates are super high. What am I missing? How do you guys and gals keep getting funding consistently?