It should be a 3 day minimum at that point. Nashville is such a big tourist destination, the longer requirement has stopped the months where every Friday and Sat is booked, but nothing else.
I first tried this last year, forgot I had set it and ended up with a full calendar in August, most bookings coming 10 to 5 days in advance.
I set the 4 day and then lower it as the time approaches.
25% of guests book just a week in advance is the information I found somewhere.
I did just find that one guest for next week failed verification. Thru Wimdu, I have 13 days this month booked, but that leaves a lot of open days.
I do know that there is a lot of competition but Abnb has told me, on occaision that while my cost was above neighbors, so was my occupancy.
Thanks for all the help.