My 85 year old mil will NOT sell her home, and go into assisted living.

We are helping out with her nurse care and home expenses, so she can stay home, as long as possible, but the caregivers, etc. are getting expensive.

Anyone know about reverse mortgages???....her home and small acreage is appraised at about $250,000....what percentage amount can she expect to get out of her home with a reverse mortgage???