Not to be critical but  advertising wasn’t allowed.  

Go to any of the large, national hard money lenders, including the ones which advertise here on BP.

STRs have platforms that do much of the heavy lifting to advertise your unit once you've set everything up.

I recently looked into doing docusign route, but was unsure if I could have the notary sign after the tenants have signed electronically. 

Just curious as to what percentage of STR landlords advertising on Airbnb or VRBO would allow 30 or more day rentals on their property?  

FHA limit is 3 homes or less that you broker yourself, or a maximum quadplex if you live in one of the units, and you cannot use any kind of agent nor discriminatory advertising (IE you can't advertise "no disabled people" but you cannot be held liable under the act if you do discriminate this way). 2.

I don't advertise units until they are vacant and 90% prepped.

If for any reason, the Prospective Tenant(s) fail to complete all move-in requirements by the above listed date, the Landlord will return the property to public offering and the entire binder sum will be forfeited to the Landlord for expenses including, but not limited to, lost rent, holding costs, advertising costs, and marketing costs.

Look at where you are advertising. 

Do I need advertising?