I also call the local court system to see if anything is flagged on file. 

That would be a red flag for me personally.

Your post in the other forum was flagged and was grabby.

What red flags should I be aware of?

Large up front deposits are usually a red flag that the contractor doesn’t have operating capital which often  leads to project slow downs.  

Quote from @JD Martin: I never got to see them, but I have no doubt I was flagged more than most.

That’s a big plus for anyone trying to keep consistent cash flow.But there are cons too: extra paperwork, annual inspections, and generally a bit more red tape.

We have opted for a hybrid approach - LPs who want to pay for access can get an exclusive network, privately discuss operators, privately review and see other LP reviews of sponsors, and discuss "red flag" sponsors. 

That's a red flag that your new PM doesn't know what they are doing.

The new homes will be mostly built in the burbs, and I expect as we move forward outside of many city limits or in smaller cities where the builders can control the narrative with less regulations, less inspections, less red tape, lower requirements.Due to the number of people moving though, we'll see some urban infill as well I expect.