Concerning you did not list educator in her tasks, and instead focused on the least important aspects of “childcare”.
Children shouldn’t be a business model, but proper ECE is vital at that age where they learn more than any other time in their life.
I work for a non-profit, and assuming your $50 is American we would charge about $75 and with that comes along with a team of professionals who have studied how to do all this and can support each other and the children’s development while minimising risks.