Put them in the fridge/freezer, etc and she writes directions on everything for heating/cooking.

Put the date on your fridge.

It looks like a fridge would be 5 years.

And you might want to consider putting small fridges in the rooms, to avoid fights over people stealing food and allow locks on their doors.Just anything you can think of that's a pain for roommate life, try to avoid.And I suggest only advertising to groups you'd want to rent to - such as the engineering department bulletin board.  

I have a newbie question: My tenant moved out and I've found the brand new fridge I bought unplugged.

Tell her the rent will be raised to $750 in....pick a month in the future far enough away that she has plenty of time to figure things out, if she wants to leave, and, maybe you could also give her a choice of some upgrade to the unit - new fridge, new stove, new carpets, etc.  

There will be no electricity, meaning no lights, no hot water in the shower, no fridge, I am reading up on that and it's considered uninhabitable. 

Check to see if there are scraps under the fridge, near or under the stove.

I don't have the details yet on the dimensions of the space or their fridge.

.- some won't agree but I install glass top ovens and a fridge with water/ice maker.