Also, if you think about it they're just aggregating data from various sources.

By your own admission you are not interested in sourcing acquisitions or capital raising, so get a job working as a property manager or in  operations for a real estate company. 

Larger, nicer homes tend to be more expensive to maintain and harder to rent consistently due to high turnover costs.4.What are your other sources of income?

Deal sourcing- if you’re willing to search regionally, don’t ask anyone to sell that isn’t already in a sale mode. “ No marketing.”

But I'm almost exclusively sourcing them off-market.

And if you already found some other sources if you could let me know how you found them.

@Philip JonesYes, it can be a source of frustration and a complete time suck but you may find a deal.  

A good broker maintains relationships with various funding sources, including individual investors, investment groups, and financial institutions.

By sourcing directly from trusted factory partners, Griffin Modern saved significantly on key elements like the Pivot door, floating staircase, glass handrail, and casement windows—items that normally cost 30% more when purchased at retail.

Note: This all pertains to the 2022 tax year and I still have a W-2 job which is the main source of my income.Given I've only owned a rental for one year (also my first home ever) and I'm very new to rental-related taxes, I of course hired a "good" tax advisor/CPA to help ensure I stay out of trouble with the IRS.