STORAGE FEE FOR A BOAT for a charter business_also a Line 27 item?

Should I put the dry slip storage fee for a boat also on Line 27 Schedule C?

It seems such a common expense.  

Yet it doesn't fit under any of the categories / lines on Schedule C.

 

I think Storage should be a line on its own! 

There must be 100s of 1000s of Americans (businesses) storing items, and vehicles and big tools and so on,

on other people's property, so it is not a rent, otherwise the fee could go under Lease or Rent Line 20b.

 

My son stored his boat on a someone's personal property.  Now how do I deduct that expense?

 

My list of "Other Expenses" is already getting so loooooong ....