@Kenneth Mims you would be looking for a blanket loan, however if you don't need the additional mortgage slots it may be better to refinance them each individually, but it will depend on many factors including the lender.

If the SD will cover wear and tear and the rent you have no obligation do file other than to alert other landlords to the game played by this tenant. 

That requires a lot more effort than putting a few quarters in a slot and pulling a lever.  

Preferably the 10AM to 11AM slot. 

If I had to collect 14 rent cash payments at once in the neighborhood my properties are in every first of the month on the dot, it's not a question of if I would get shot, it's when.In your situation you can build a strongbox on-site with a slot through a wall or door, maybe in a maintenance closet.

Are there slotted vents in the foundation wall?

The strategy for me is I'll have 50% equity and profit sharing (and expenses) but the conventional loan will only be in her name so I don't use a mortgage slot on my credit.

Do you have rent roll to prove that current slots there are actually paying and on time?

., one way you could free up some slots for traditional mortgages would be to take cash out of one or more properties and use that to payoff other properties so that they are free an clear. 

There's no harm in asking if they have an open slot, or if you can work around their other jobs - that's different.