Similarly if you feel the material pricing is marked up by too much, that's similarly a red flag.

Is having a ton of rental properties & installment sales in a massive 1040 tax return - an IRS audit flag??

Tenants still win most disputes in red states as well...evictions may be a little easier, but it's not like there are no problem tenants in Texas. 

If he lived in the same place for four years, that should reflect on his credit score.I think you've found enough red flags to justify denying them.

Even “red” states pass consumer protection laws, usually prodded by some outrageous behavior.  

@Jake Barrutia I personally see this as a huge red flag too.

Its one thing to have an opinion, but I would not want biggerpockets to have a chatbot to answer those questions (nor would I assume they want the liability).Within your comment lies the more reason for AI powered fact-checkers and flagging system that can flag bad and good advice.

Additionally, these investors can provide warnings about potential red flags, ensuring you hire reliable contractors and property managers.

Then red leg partridge hunting for 3’days.  

Cycling the red rock loop.