@Jennifer-And-Paul1 yes I can see you have a challenge before you by not loving nearby.
This is one way we are able to contribute to our trying to achieve a sustainable Airbnb.
You could use solar panels as @Felicity11 mentioned and a battery for electrical storage and using LED lights. In summer,autum and spring you could use solar lights for outside lighting.
Have you thought of a water tank for the garden or washing machine. I you can use grey water it can be recycled for the garden or for toilet flushing.
I dont know if the location has recycled bottles and cans which can reduce waste. Having plastic containers for leftovers or using what I call a plastic hat for going over dishes to save on plastic wrap. Yes dispensing and filling up pump bottles for hand and body washing from bulk supplies.
What you do need is a good Co Host, managemt team to work with or be inclined to assist you with your products while you are absent.