Reasonable Number of Maintenance days on Vacation Rental?

[Jim Hamrick]

The IRS discusses vacation home maintenance days.  They use examples where a family performs maintenance on a home for a week and the week is not considered personal use (it is additional to the 14 days of personal use and/or 10% of total days rented to non family members for year).  

My question is that if I have a high volume short term rental how many days or even weeks can I legitimately schedule for maintenance?  I would like to pre-plan this into my published schedule.  What is considered a reasonable number of maintenance days?...one week?