I want my elderly mother to live with me and my family even though my husband is against it
Why does your husband not want your mother living with you?
He knows nothing about her and he thinks she's too old to live with us
You want to care for your mom in the privacy of your home, but your hubby thinks it's not a good idea. I think you should at least give it a try, if it doesn't work out then you can do something else. Letting her live somewhere unfamiliar to her might cause her more stress and die.
If only my husband were as rationale.
Introduce your mother to your husband before hand and see if they are able to get along. Set aside a private room for them to stay in and let your husband know they you will be the one looking after her, so they don't have to worry about any responsibilities.