Buying from and renting back to Mom

[Michael Douglas]

Is there any strategy to preserve the equity in my mother's home that would not be undone by the 5 year Medicaid look back? She's 75 now and it is uncertain if she would be able to still live on her own long enough be safe from Medicaid forcing a sale to cover her long-term care expenses.

I've considered buying it from her and she pays me rent, but there seems to be some legal issues with that.

I've read some comments about a trust, but any insights would be welcomed.  Thanks.