Yes, you'll need to file an 1120-S and GA 600S assuming the LLC was organized in GA and has only GA source income. 

“Urban Markets Face Far Higher Risk Than Leisure Destinations.”Source: https://www.airdna.co/blog/coronavirus-impact-on-global-short-term-rental-markets

However, you have no phones to sell and no idea how to find a source willing to sell the phones for $525.00.

Only locals know what's going on, and your best sources are the neighbors.We heavily invest in C/D areas, and just picked up a house for $22.5K, long term tenant paying (SUPER sweet lady!)

Would you advice this, utilize a HELOC, or find another source for funds?

Learn to interpret data, rather than accepting the interpretation (opinion) of someone else.This is a great source (biased and opinion based)This is great for those of you who like to get really gritty and detailed in your data, projections, and sources.Approachable data regarding all things OKC.My favorite video on how the economy works.Ray Dalio’s projections based on the above template

Are there any sources for best practices for cleaning in this type of situation?

PMs are usually a great source of info for rentals. 

I would love to hear your opinion on the best options for networking virtually for something like that (webinars sound promising but where do you source the audience?). 

Great post.Is there a source for your data/information?