Also, real builders/experienced developers will often have a true technician, i.e. a civil engineer, architect, real estate attorney et al at least glance at the property info to make sure there are no major red flags.

Watching some of these videos and finding lots of red flags like that which beginners wouldn’t catch but experienced folks will know is b.s.

I'm a REI newbie, but just from a personal finance point of view $500k income + "Wouldn't mind becoming a millionaire from this as well...." is a red flag.

But there are too many red flags for me to invest with their company. 

Red flags all the way around. 

Permitting in Cape Coral is part of the problem but when a company does not even try to contact you during the process it's a red flag.

The real estate market can be characterized by 4 phases.

I think most hosts give 5 stars unless there is a serious issue so even a 4 star is a red flag for me that I would check into. 

It would be a big red flag to me if they are doing a lot of volume in this market. https://www.biggerpockets.com/member-blogs/10145/83067-limited-partner-s-guide-to-investing-in-the-right-deal

It is very unlikely that you'll have problems/be investigated for just one instance, but repeatedly doing this will absolutely raise red flags these days.