We used to leave a bottle of Proseco and sometimes a bottle of French red wine. 

So $1,200 appraisal would be a red flag for me in itself.

In fact, using cost segregation results in an unusually high depreciation deduction, which IS an IRS audit flag.

No one is missing opportunity with the land bank properties, it is just surrounded with red tape and corruption.

Financing either is a bad idea and will raise a red flag with a lender who will look at sources and uses of the loan request.

What are some red flags to avoid? 

It's the focus of many towns now and when you have a septic inspections, the companies have to turn that over to the town usually so it's flagged and most large repairs require replacement.

If they have a lower credit score or there are other flags than we charge them last months rent also.

Ask about any unforeseen challenges that have come up (there always are, so not all challenges are a red flag), and overall let them know you're an involved LP who likes to be kept up to date on things

It turns red if the date is more than 2 weeks old reminding me (in case I forgot to add a reminder) to call the person.