Professional property management is the ONLY way to scale your investment portfolio IMO.

No matter where you live or where you own assets, I personally recommend the Series LLC to be a great tool for the individual investor who is planning to expand their operation, as it allows for you to scale infinitely for FREE.

Is this just an economies of scale thing and needing to acquire 10+ proprieties?

Then scale up to flipping some of your best deals that come your way.

If the operating partner does flips a lot, he could own his/her partnership interest through an S Corp, if he/she has scaled that far. 

I've seen guys scale at a property a month, and others stumble for over a year before committing to an offer. 

This is a large scale BRRR project.

Just not on a huge scale.

I owned a duplex in Ferndale (a trendy inner-ring suburb of Detroit) from 2005-2018, and intermittently lived in part and rented it, so I have experience on a small scale with finding tenants and managing a residential property. 

I think most investors who really want to scale get to where they eventually start looking outside of their current market!