At the present time she lives alone and does not have in home care. She cannot drive, cannot climb stairs, has multiple health issues. Someone has to take her to the doctor, take her to get her groceries and take her to church. Once she moves in with me that will all fall to me to do.
Don't do it. No, you won't get paid unless she pays you.
Medicaid will not pay live-in relatives.
Check to see if your Mom could qualify for Medicaid, each State has different income requirements and eligibility requirements that the care recipient must meet. Some allow a grown child to get a small salary depending on the number of hours the program determines are needed, and again depending on the State if they allow a relative to live full-time in the house and still get paid. You might feel your parent needs 12 hours of care, the program might decide only 5 hours. Be aware that there are waiting lists for these programs and that States have been cutting back on them because of budgetary pressures.
And check with your local Council on Aging to see what is available for Aides to come to the house for a couple of hours to help give you time for yourself. Caregiver burnout comes quickly. Or what items are available for free or at low cost. Also go to the blue bar near the top of this page, click on "Money & Legal", now click on "Paying for Care".
Not all states do this! But more and more do. Check it out on your state's website and by calling the contact numbers there.