To get back to one of your original questions, I am a member of CTREIA and @Raymond B. is spot-on in his assessment: the biggest value is in the networking.

If all adults are screened, you can avoid potential legal issues down the road, especially in cases where one occupant engages in illegal activities or violates lease terms.Financial Stability: Screening all adult occupants also allows you to assess the household's overall financial situation.

I'm sure those who cannot afford the assessments will just stop paying and that will send those properties into foreclosure with the first position lenders foreclosing.  

If you're diving into BRRRR opportunities, I'd be glad to help you assess deals or explore financing options.

If you need guidance or have questions about getting started, assessing deals, or financing, I’d be more than happy to help.

If at the end of the day we can provide a deal that you've assessed and you're happy with it, then that is great.  

As an example, my personal home was tax assessed at $399,000 and my tax bill was $13,500 per year.  

Edmonton is 300km from Calgary and colder 😉 I also disagree with the assessment on price.

Here is a CSS Decision Diagram flowchart intended to bring together all the various questions when assessing the benefits of a Cost Segregation Study (via a professional or DIY).

Likewise, try going to your local investors' meeting and ask the attendees.This question is probably more of a qualitative assessment than one based on hard data.