We ask them to provide an air quality test done by a licensed company IF we do not see visual evidence. 

Seems to me that at scale, a portfolio like Luka's would indeed build wealth over time and open up options to transition into higher quality appreciation markets several years down the line, with the benefit of more capital and (more importantly) more experience.

That is where a good GC comes in, we are quality men and whistle blowers for the customer.

Added cheap square footage and improved features - ie. additional bedrooms, quality outside space, and upgrades throughout

Some have quotas, some don't.Like anything in real estate the gatekeepers of the knowledge are the people in the market on a daily basis. also greatly depends on the velocity in the market place the price points quality .. etc etc.. tons of factors for builders to consider when negotiating with buyers and or the buyers agent.

I am currently house hacking in Fort Worth, renting out rooms in my house.I am having issues with finding quality renters, though.

(Both toilet supply line failures if that’s worth anything.)I went with their remediation company (Service-pro) and their contractors for a few reasons. 1)They started everything the day of the leak/flooding. 2) They guaranteed everything, out of pocket costs, timeline, quality of work, a year to find any defects, etc etc  3) it was quick, painless, worry free.

If your building is the problem building then you need to clean up and I would probably give everyone 60 days notice to get out, rehab and improve my tenant quality.

Curruthers’ insights reveal that the strength of an empire is not solely determined by financial success or market dominance, but rather by the quality of the relationships that underpin it. 

Now, if it's investment properties, that's a whole different story, and yes there is ways to confirm not only numbers BUT the quality of that connection.