She is a fall risk and in a wheelchair. We have no help from my siblings and cannot watch her because my wife and I both work fulltime. Her SS income is only enough to pay for about 4 hours a day/5 days a week. She will be alone and can fall or walk away... can we make her ward of the state but still see her?
Something else you can do is talk to your county's area on aging. It is often part of the Dept. of Human Services. See if they could arrange for a social worker to access your mother's needs and locate resources for her. A good social worker will know about places and programs that will be a help for your mother.
Many people are in the same boat as you are. Elder care is so expensive and most cannot quit their jobs to do it. I hope you are able to find resources for her care.
In the meantime look into a daycare program for her while you're at work
Contact your county area agency on aging for resources and referrals