@Mindy41
We also provide basic necessities, such as coffee, tea, spices, spaghetti, a couple jars of bottled sauces, bottled water, fresh bread and/baguettes & croissants from a local bakery, a bag of crisps, butter, a couple of small jars of jam, fresh picked oranges (we have trees and there's an electric juicer in the villa), milk, a few beers, and usually a bottle or two of locally produced wines, which we buy inexpensively from a local wholesaler.
Of course also the practical necessities like paper towels, dishwasher tabs, small tubes of toothpaste, soap, shampoo & rinse, tampons, hand creme, and cleaning supplies... which we also buy in bulk at wholesale prices. The average cost per booking is only about 25€.
As others have pointed out, we also wouldn't ever leave "used" food or other things. No. Never. Everthing new & sealed. Except for the fresh bread & oranges, etc.
But I can assure you, guests absolutely love this, especially after a long flight, the last thing they want to do is go shopping. And especially if they arrive late and are forced to shop at the petrol station, where you get very little choice for triple the price of anywhere else.
They rarely consume it all, often never even opening some packages, but they often remark positively about it in their reviews. It's money well spent.