The cleaning fee covers washing and drying linens, 2 - 3 hrs (usually) to clean as there’s 2 bathrooms, 2 levels (living room, dining room, 2 bedrooms, office and a backyard). The fee also covers restocking the unit with basic cleaning supplies, replacing worn and damaged linens as needed, and weekly garbage take out as this isn’t an apt building with a super.
In your case I had to clean up after a party. It took me 4-5 hours to clean up. I had to move furniture back in place. The party filled 3/4 the bins outside. I restocked the gas tanks for your party as well.