Her response was that I would be charged for the full month of march rent ($1,800.00), a reletting fee($1,800.00), and forgo collecting my deposit($1,800.00) + advertising cost and fees(Dollar unknown).

When there are no events, the venue has been booked for short-term rentals.Business has no debt, and is turn-key (advertising is creating a healthy pipeline, there are existing employees, and will come with all the inventory and FFE&V). 

You just make sure you start advertising early enough -- usually for us about 1.5 months before the tenant will leave.If you're looking for MTR resources, @Erin Spradlin's books are great -- Erin's Guide to Midterm Rentals, American Nomads, and My First Rental Workbook: Midterm Edition.

The cashflow was not as high as they advertised and they do take a $5,000 fee.

You can also advertise your listings on the SECT8 website with them. 

Another option is to join local community groups or forums where contractors might advertise their services.

I can't order furniture, set up moving dates, or advertise for roommates.I'm also undecided on whether I should pursue STR/MTR/LTR options. (5 minutes away from groceries, 15 min drive to DT Seattle, <30min bus to DT Seattle)Do you have any advice on what steps I should take leading up to the closing date, which is just 2 weeks away?

They do a lot of advertising. 

I've been highly interested in investing in a condo to advertise as an STR in Gulf Shores/Orange Beach, AL, Pensacola, FL, Okaloosa, FL, or Destin, FL, but have been lacking internal support and confidence to pursue this.

And one must ask themselves WHY anyone 'advertising' to teach others, won't agree to "share the risk" by meeting someone 'half way' for say a minimal down payment, then "doing the work" necessary, or they LOOSE their' deposit?!'