I found really good deals and paid cash.

And at what nominal price compared to the $24mil they paid in 2019? 

If tenant raises factual defenses such as falsifying the lease or claiming they paid rent, there would be a brief trial which you would be prepared to testify against. 

So if we go w/ the $700K purchase price of the new rental (paid in cash from the proceeds), that leaves them w/ $300K to pay capital gain on, @15%, totaling $45K. 

I paid off the loan as the solution.

In most situations, the more profitable a property is, the higher percentage the GP is paid.

Is the Redfin pre built? 

I have on multiple occasions, once with one of my own properties and a few times for clients been able to not only get the money they paid for a property but also gave them extra money in a total loss (protected the equity that has accrued due to inflation in the industry).  

I came in and paid his arrears plus his escrow shortage on top of putting money in his pocket. 

Most community banks in commercial lending will have a pre payment penalty if you refinance or sell.