It is a human.

The truth is that the universe is full of black swans mating with butterfly effects, so that even though it IS as fair as anything can be, no human can predict it.There are reasons for which people are predicting a crash, and there are reasons that it hasn't happened.

Since flipping qualifies you as a "dealer", you cannot qualify for an installment sale which means I have to pay gains tax all at once even though I am taking payments.  

Of course, regional prices come into play too and my market is usually quite cheap...I would add - perhaps habitat for humanity or another similar non profit would be wanting and willing to strip the house of reusable items - good for them and for you.

Software is making the best guess it can based on the available data - no human is involved.You may have paid "cash" "off-market".

The toilet was full of human waste and wouldn't flush.

All brokers are human and can make mistakes.

Your seller may be exempt from new laws, since you are a dealer, not an owner, you may not have the same exemptions.Financing real estate is a very big deal, if you were doing this selling a bag of apples it might be a good idea, those that don't understand RE financing should stay clear of dreaming up things, Do some reading, much has been written here about CFDs and other methods, the CFD is the worst way now, I suggest you not go there like that. :)

Maybe Tenant Durable but nothing is human proof unless you built a caveman style house made of concrete with no utilities.

Buying as cheap as humanly possible