sounds like you added too much water days1-18 you can get by with very little I havent added any yet and my hum stays around 32 remove plugs and pour out excess water
to be able to sell eggs you will need at least 8-10 hens with 6 hens you will adverage out mabe an extra dozen or 2 a week after they are laying good. 2-3 dollars is good price.consider food cost