How I can better support myself with support when Mom returns home?

Hospice will be a huge blessing to you and your family and it is a free service so you won't have to pay for it. They will provide you with counseling and support as well as end of life services for your mother such as nursing assistance and supplies. Hospice is a very, very good thing.

jeannegibbs is right - your mom's spitting in your face has to do with pain, fear, dementia, delusions or hallucinations. Forgive her. It's just very unfortunate, but not unusual.

If her doctor thinks hospice is appropriate, I would definitely use hospice services, either in her home or in a Hospice House, if that is available to you.

I don't know anything about your mother's impairments, but often these spit-in-your-face kinds of behavior come from pain, dementia, delusions, and not from the person's true personality. Forgive her and let yourself heal.