from what I understood your job here is not a teacher but a private tutor or in other words a nanny, if I am not mistaken because I know of a filipina teacher here who has the same job as yours (private tutor)and her salary is 400 USD. She is staying at the employers house as a tutor and nanny as she is the one taking care to the child from the food she eats,get her ready to school, take her to school,pick up and doing some household chores.So you have to make sure first what really your job description as a "private tutor"is.
It's up to you to decide whether 400 USD salary will help your family or not.
from what I understood your job here is not a teacher but a private tutor or in other words a nanny, if I am not mistaken because I know of a filipina teacher here who has the same job as yours (private tutor)and her salary is 400 USD. She is staying at the employers house as a tutor and nanny as she is the one taking care to the child from the food she eats,get her ready to school, take her to school,pick up and doing some household chores.So you have to make sure first what really your job description as a "private tutor"is.
It's up to you to decide whether 400 USD salary will help your family or not.