How to solve this family problem?

My Grandma has Alzheimer’s, she’s in her late stages of Alzheimer’s and needs constant attention, she can’t eat, or go to toilet alone, we don’t want someone else to take care of her because she needs lots of patience and gentle treating because all her life she was very respected and even she forgot everything now, she still needs respect, lots of care and love.

She has 3 daughters one of them is my mom. My mom is broke and even my family house is really small and poor. My parents had to sleep on the floor so that we could sleep in bed.

So I and my sibling moved out together 4 years ago at 21 and we rent an apartment together to live cozy and comfortable life.

My second aunt is rich and my grandma usually stays with her after grandpa’s death. However, my mom goes there takes care of my grandma 5 days a week, including nights, bathes her, cooks, cleans and does everything.

My aunt and mom often have arguments because my aunt looks down on my mom and she left her house because of that.

Now they decided to take care of grandma apart from each other. Mom can take care of grandma for 4 days a week and aunt will take care for 3 days because she’s working.

The problem is that my parents house is too small and grandma can’t feel comfortable there, so mom asked me and my sibling if she and grandma can stay with us , Of courae I said, yes. She’s a very good mother and a helpful person but deep down I feel uncomfortable to know that now, I will have to restrict myself again and I’ll have to live uncomfortably again.

How can I solve that problem?
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How to solve this family problem?
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