Since then, I've paid $550 in fees, and probably accrued over $1200 in additional taxes (total probably ~$3200 outstanding).

Just out of curiosity - what is a standard timeframe for something like this start -finish ?

But I am still obligated to pay them the interest accrued over the course of the lease. 

Hey Ketan, I can't really help you with your question, but just out of curiosity, why do you want a line of credit on your investment properties instead of getting a business line of credit that is unsecured and not tied to an asset?

Shutting off the interest accumulation during a Deferment period when the Deferment Agreement they originated discloses that Interest will continue to accrue during the deferment period.  

Once I am able to and have accrued enough points I plan to become a licensed broker.

Just out of curiosity, any suggestions for apps/sites for collecting rent that have worked well with your tenants?

Even if they did delay mortgage payments, it would still accrue interest and it would just push out your payment schedule. 

We held the lien for several years, interest accrued, we learned more and got a lawyer to negotiate the terms for us.

This makes your 2019 Tax Balance due by July 15 2019, Interest and penalties will begin to accrue on the 16th.