The nursing home personnel explained that when my mother-in-law's money goes into a pooled trust they will pay her bills and she will have $800 a month for herself. Is this correct?

My 78-year-old mother-in-law was in a nursing home after a misdiagnosis of Alzheimer's. She's been on Medicaid for the last 2 years. We hired a lawyer to help us with that, but we are trying to set her up with a pooled trust to get her home care along with help paying her bills. She makes approx. $1,900 a month. She has no assets. According to my brother-in-law, the way the nursing home personnel explained it to him is that her money goes into a pooled trust and they pay her utilities, rent, bills, etc. She will have approx. $800 a month for herself to use as she pleases each month. This doesn't seen correct. Any info is appreciated.