I have tried lessons with a few Italki teachers and I haven't found a bad one yet. I am currently studying Spanish. When searching for a teacher there are a few things I look for: Age, hobbies, how they appear in the video, and their reviews.

Everyone's idea of an "ideal" teacher would probably be different (example: I am a younger male with interest in things such as music, education, and I tend to be more introverted. I look at many teachers and find someone who meets mi criteria which normally is a younger male as well because I feel like there would be more in common.) For your mother I have seen some teachers that are older (maybe she would have an easier time learning with an older teacher because there could be more in common.) and for your daughters maybe someone who is a younger female that has a good grasp on English.

Try asking them some questions about a teacher they would feel comfortable with and then from there you can pick one. Feliz Aprendizaje!

I am a native English speaker but I have lived in Mexico and Ecuador. my level is B2 and I’d be glad to help free of charge

Maybe, she should try with trial lessons to find her best teacher. I'm sure that she will find a good one very soon :)

I love teaching older people, especially when they talk about their stories in Spanish. I would love to help you with these classes.

I focus on conversation and repetition techniques with different power-point presentations and books.

I can help you, I'm not a teacher on italki but I used to teach languages at home, I'm from Peru and spent 2 years teaching Americans how to speak spanish, and I spent a year teaching kids at school what I realized people need is to speak Spanish ALWAYS everyday so they can really speak and remember the language, I can talk with them teach them and also let them messages, films, they can even practice with other Spanish members of my family, so they can have a challenge understanding!!