Sister having psychosis. What can we do?

My sister has been in psychosis for two days. We have been dealing with this since early last year around the same time. Last year, she had 3 episodes. After the 3rd, she started taking medication consistently. Constantly complained. Constantly said she didn't even need it. That she was only taking it for us. Apparently, she convinced my mom to allow her to only take 1/4th of her dosage for around 3 months. I didn't know about this. We all live together. It appears the low dosage has caught up to her. She's an adult. She refused to get health insurance after me pretty much begging her multiple times. She quit her job (another job, again) a couple months ago. I don't know what to do. I fear she may not be able to get out of this episode on her own and needs to go back to the health facility she went to last year however we have a $6k bill from last time bc she doesn't have insurance and they said they will not take her unless the bill is paid. The ER/hospital would admit her, keep her for hours and hours, rack up as many billing lines as they can, and then finally send her whatever health facility that takes the bid. She would get to go for free to the facility but the hospital will send us a 9k bill like they did last time. We were lucky and blessed to have that bill excused when we applied for the hospital's charity program. (That was a lot and a blessing bc they denied her at first). I don't know if we can have that again or not. It's a big risk to be responsible for another 9k bill plus the 6k bill AND we dont get to choose what health facility they will send her to. When my sister is in her right mind she isn't reasonable still. We explain the logic to her of how she needs to get help but she is in denial. We explain the logic in her getting health insurance and she refuses. She doesn't take steps to make sure this doesn't happen. She says she isn't schizophrenic.

Does anyone know what we can do/should do? Please help. We are exhausted watching her in shifts. But we fear the situation will be worse if we make the wring choice in where to take her.

She has a psychiatrist appointment later today that my mom will attend with her but idk how that will turn out.

Advice/wisdom/kindness would greatly be appreciated thank you.

Posted this here and the other sub bc their bot suggested it.

Edit 3/20 - Thank you everyone who read this post and took the time to comment and try to help! Truly bless you and thank you. I will be looking into all suggestions. Several hours after the post we tried taking her to her psychiatrist appointment. She resisted leaving the house. She resisted getting out of the car and then she refused to go in the facility. She was out of control. I spoke with the psychiatrist and health director. I told them she has not been taking her cutrent dosage for perhaps 2 months. They advised me to take her to a crisis center, which is their sister location bc they can't stabilize her. They are outpatient but the crisis center is intake. They told me it was free. (Unsure why no medical providers suggested this to us last year. Everyone just mentioned the ER). Took her, and they put her on an involuntary hold. They confirmed since she doesn't have insurance they won't bill. Today, I am numb and sad but grateful for the kindness of strangers, the support of our family, and blessings from God. Thank you everyone again.