I am in a co-op program which means I rotate between classes and in-field work each semester.

And to others' points, most new or mid-range investors treat agents like rotating bobbleheads and call and say I have X money, find me an investment that works.

A rookie Matt did this in Pittsburgh and we all love it, it is well attended, he has rotated in some great topics and speakers, and he's new to all of this and just eager to learn like many others. 

Use it in rotation.

There isn't a rotation of liquidity from one place to another, but rather an injection of liquidity into the economy (meaning more growth).

But how does one approach you, while you already have your tried-and-true colleagues, and earns a shot to maybe just be in your rotation?

If they accept it, you can rotate them into the updated unit, and fix their old unit.

Regarding the mortgage piece, remember that, when owning outright, you can take as little or as much as you wanting; however it's not a rotating line of credit so if you want to do it again, you'd have to apply again. 

Is there a PDF cheat sheet in rotation on house hack deal finding, or financing?

The population boom mixed with a constant rotation of renters just makes it feel like a good area to invest further.