I am surprise this company is still around.Plenty of surprises they don't tell you about,  I am not sure how they can sleep a night. 

I agree with @Michael Baum - you will severely limit your potential renters doing a 7 night minimum. 

I attend 3-5 meetups monthly and we have local meetup https://www.cirpp-live.com/ been arounds since 1974 and we meet twice a month (one network night at local spot food, drinks, socialize and one day 1130am-1pm guest speaker and food at I-Hotel on campus) that have found vendors, private lenders, etc.

The only downside of using a commercial line to try and match the AIO loan is that I have to manually move money into my line of credit(LOC) and sometimes ACH payments take 2-3 business days unless I wire it in and even that might be the very next day.I basically pay down my line with everything beyond my min reserves + savings.The advantage of the AIO is it automatically sweeps over your balance in your checking account (provided with the AIO loan) and pays down your loan with any idle cash each night at 12AM and calculates daily interest based on that reconciled balance.

I cant sleep at night, I cant think straight, I am on the verge of potentially losing everything.

Find out what a typical nightly rate is for your area (not what air bnb charges, the actual nightly rate the owner will receive not including the cleaning fee).

You'll often see variations in minimum night stays, use of 3rd party management companies, and general attitude toward STRs.

I would recommend getting a couple DSCR quotes, a couple conventional quotes if you want, and go with the numbers that help you sleep best at night. 

Annually, Does the higher nightly rate but higher vacancy rate push off the highest operating income? 

@Sergio P Ramos, while I try to avoid listing during the holiday season, I just had a flip go pending last night.