Should I put my mother in a nursing home even if she doesn't qualify for Medicare?

I (daughter/caregiver) need advice from someone not close to the situation. Scenario: In 2002, mother had aortic valve replacement. She is now 91 y.o. and has COPD, hypertension and high anxiety broke left hip in 2009. After rehab and stay at board and care, moved into a two bedroom apartment me. Mother was able to take care of self while I was at work though called occasionally with questions which workplace didn't like. In 2010, broke right hip, went through brief rehab, came home, ended up too weak to stand or care for self so went into nursing home. When I got laid off, brought mom home and became full time caregiver. Because of less income, we decided to move to central California because of lower rents. We hate the area and want to go back to Orange County and back to high rents. However, during an urgent care visit, I have been made aware that replacement heart valve is not working well. We are in process of applying for an apartment in Orange County. Once we get back to OC, I plan on having her assessed by a cardiologist. However, because of the need for more income, I am afraid if I work outside the home and mom is alone, that she'll be unsafe. She should really be in a nursing home but because she's ambulatory, she doesn't qualify for medicare/medi-cal paid care.