Can family member,daughter,son who has Green Card apply for their mother,sister and how soon will she get it

[Monde]

It's another question about a green card. My family,me ,my husband, my two daughters have green cards,but as i said earlier we had to go back to our home country.We are not financially capable to cover our air fares and etc.etc. What will happen if just one of us goes there and keeps his green card will he/she be able to apply for the others and what do you think how long it will take ?
And thank you George for your previous answer. About the return resient alien visa , is it difficult to get it? What about a student visa, what is needed for a visa? if my daughter decides to study there, and before that loses her green card.
Thank you again