I recently had to replace my HVAC system because it was red-tagged.

On the other hand if they are a sponsor that is experienced in stopping a skin in the game, that's a huge red flag for me.c) how open to scrutiny are they?

By and large, QI's have very high ethical standards, and are sometimes overlooked as the engines of this tax saving tactic.]REPUTATION MARKERS 📊INDUSTRY STANDINGMembership in professional organizationsLeadership roles in FEAEducational contributions to the industryRelationships with major title companiesCLIENT RELATIONSHIPS 👥Testimonials from CPAs and attorneysReferences from title companiesLong-term client relationshipsTransparent fee structuresRELATIONSHIP RED FLAGS 🚩Overly familiar with your realtor/brokerKickback arrangements (illegal!)

I suspect but dont know .. this has all the red flags of lenders to watch out for as in pump and dump due diligence schemes..

You looked past a red flag right at the outset:"When application was made tenant was I am not going to to have my puppy with me so do not need pet fee or application"Total red flag.

The sponsor if they even consider allowing you would be a huge red flag for me knowing if they will accept non accredited investors what other rules are they breaking. 3.

Huge Red Flag for me!

Only caution is if they don’t have checkbook control and there’s a time crunch going through the custodian can cause delays and red tape to deal with.  

Fake income documents are easily purchased online, and inexperienced screeners often miss red flags.

@Geoffrey Serdar- thats a 4K red flag