I would run two calculations: Cash Flow Analysis and Return on Equity (ROE).Cash flow is pretty straight forward.

The ARV would be the key factor of extracting your CAPEX thru refi to boost your CoC or ROE.

Find an IRS lien on a property, and the IRS has the option of overturning the Tax Sale.5. 

I used to be a BRRRR investor, then I realized my ROE of my rentals was paying less than I could make doing passive investments. 

You'll be shocked how many cases got overturned due to the Bureau's failure to strictly comply with the notice provisions. 

So... the government of Ontario has just put a moratorium on rent increases for 2021 (overturning the paltry 1.5% increase previously set).

I'd find some info, but also more terms I didn't know like NOI (Net operating income) and CAP (capitalization rate) and GRM (gross rent multiplier), ROI (return on investment), ROE (return on equity), DTI (debt to income ratio), DSC (debt service coverage) and so on.

Overturning a diagnosis will not happen, it does not work that way.

Overturned in appellate court. 

Whether it is a deal or not depends on further analysis, COC ROI, ROE Yield cap etc and your financial plan and goals.