My family is in a pretty rough situation right now. My sister and her children are in a horrible abusive situation, where her abuser is currently growing more and more volatile every day/ every hour.

I cannot go into too many details, but he is acting like he's had some kind of break. He is both attempting to kick her out, refusing to pay their family's rent, and threatening to leave her alone in the house without the rent payed. He is emotionally unstable, and has been put on the news recently for unrelated insane behavior. Fifteen minutes ago, he went off the handle when she said the words "domestic abuse" in regards to seeking financial help (from like a womens shelter or domestic abuse resource program) with what he's putting them through and started screaming at the children as well. He has often been very cruel to my sister, even taken out his frustration on the household, but name-calling at the children and screaming horrible things at them is a new escalation. I worry for what may come next.

She needs to leave, SHE WANTS to leave, my mother and I (this is our whole family aside from her and the children) want to help her get out of there, but we cannot afford to. He has intentionally and deliberately isolated her, and moved them 3000 miles away from her small family; the cost of plane tickets to fly there so that we can pack her and the children back to us would put us in debt alone, not to mention the cost of flying the kids back home with my mother & driving back with my sister. I cannot simply say that she has to leave all their possessions behind, because she is a complex person and not simply going to leave the children's beloved items behind. I wouldn't even ask that of her unless things got worse to a point where she felt concerned for their lives, or if they were immediately being evicted. Currently she is most concerned with rent, because due to the financial restraints we probably cannot get to her & help her get out before the first of the month. However, we cannot afford to cover the rent without creating debt either. The debt would be worth it if she were safe, but my mother already has so many credit issues that she cannot actually get loans like that & I don't have any credit cards or a job (like my sister, I am currently a stay at home wife where I do not make the income in the household). I am afraid because every moment we wait, the worse he is getting. He physically has been blocking her from leaving the front door, etc. However the finances has put everyone in a very intense strain.

Here is my question first and foremost: does anyone have experience with the financial aspect of this? Does anyone have advice or insight on how to make this escape possible without me opening a credit account & going into debt? Would anyone who has experience leaving an abusive marriage in such financially difficult circumstances/far away from any support system situation be willing to reach out to me so that I can hear from your experience what would be best? And lastly, if I made a fundraising page, or shared her paypal or my own cashapp, would anyone be willing to donate? I would be willing to prove that the money was used properly. I know it isn't anyone else's responsibility to help, but I feel stuck and lost. And terrified. And even if no one can help financially, literally just direction, advice, words of wisdom would help.