i'd charge 20 bucks an hr. make them buy the misc stuff, or just add the cost of misc. to your bill. run it like a business. you never know it may turn into something.
i have the same thing, tank has been cycling for 7 days now, i have starfish, pods and bristleworms munching it. all my water parameters are stable so i may introduce a few clean-up guys to help. i think its normal. it means theres life.