Despite our back and forth, everything has been civil until his most recent email, where he’s stated that his worker who did the work will testify that they used their own materials on the toe kick (a lie), that he is tracking time it takes him to respond to these emails and will charge me for said time.

I would say the Great Depression and the Civil War and possibly other events would qualify"never in history (and please fact check me on this) has there been an event that has had such a massively negative correlating effect on all sectors of industry all at once"

Any civil cases will be put on hold until April 15th.

All civil cases will be postponed until April 15th.

I'm a civil engineering consultant who has been in the industry for about 3 years since graduating college.

The courts pushed all civil cases like this back until April 14th due to Covid-19.

Time to stop talking and consult an attorney(commercial litigator).

I just think we can disagree on someone's thought process and be civil about it. 

As a result, a number of changes have been made impacting every division of the court and including suspension of jury trials in the civil division, restriction of general motions and housing court motions, the rescheduling of arbitration and Board of Viewers hearings, the postponement of all cases in the magisterial district courts, and stays on execution of orders for eviction or possession of residential properties.Individuals having business before the court are encouraged to read the complete Order of Court: http://j.mp/2Wlfd3w.

You're question is better answered by a lawyer which handles landlord/tenant litigation on a daily basis - and yes, there are plenty of instances in which a Landlord and especially a PM (which has a responsibility to an additional party - the owner) will be held liable for non-action.