I am also RE agent and have already advised my clients not to buy any condos unless they are really financially and emotionally ready for the risks involved. 

You also need to be able to take the emotion out of the deal and be able to walk away.

As a lender, I'm sure you know a million agents, but you may consider finding one who owns investments, and therefore understands not only the mathematical calculus of divesting from an investment, but the emotional ramifications as well. 

By approaching from the "objective analysis" rather than "who is the good and bad guy", you are really educating a basic investor.Capital call is a myth/method created by the lender as a temporary measure by the lender to avoid foreclosure.Nonetheless, these capital call is created because the lender itself is willing to take a such very high risk investment that should not happen in the first place.A DSCR loan of 0.85 80% LTV should not happen in the first place.

Currently working on analyzing properties, with a goal of minimizing human emotion  and solely looking at the numbers to purchase positive cash flowing properties.  

As an example, in your case, the bridge loan would be used to convert your existing mortgage into a temporary loan with a very low monthly payment.

Don't let your emotions get the best of you because you see your cash flow going down with all these repairs.

Tax sales are a balancing act among (1) the need of government to collect property taxes and, if owners will not pay then, then to provide incentives for investors to purchase the tax rights and (2) investors, who need an attractive return for the risk they are taking, and (3) citizen taxpayers, who should not lose their property and all equity because of small debts and perhaps temporary or at least relatively short term financial difficulties.

 how about filing a motion for a temporary restraining order (TRO) and preliminary injunction to enjoin (stop) a foreclosure sale? 

I'm not even sure you can prohibit them displaying a small, temporary political sign at all (legally), though as Theresa said you might be able to prohibit all signs.