My mom isn't happy I'm leaving

I just got married and my husband is in the military, so I'm moving across country to be with him. My mom loves him and supports the marriage, but she doesn't want me to leave.

I wasn't supposed to leave until November 2020 but some plans got changed and now I'm set to leave mid-February 2020.

Now I've been taking care of my mother since I was a child, she trusts me more than my siblings so I took on a lot of responsibility at a young age. The reason for this is her disability. I tried to get her to start transitioning as soon as I knew I was leaving, but she kept saying we had time and wouldn't listen.

Now she can't even be excited for me because all she can think is all she won't be able to do when I leave. I'm not sure what to say to her. It hurts that she isn't excited.

I want to start transitioning as much as we can but she won't. I'm at a loss.

Edit*

We contacted a companion care center through her insurance last year, at the time they had a year waiting list. We don't have any family that wants to help. We can't afford to pay out of pocket for our own caregiver. I don't know why she won't start transitioning knowing I'm leaving in only one month. I'm not going to push though, I'd rather make gradual changes than she have to go cold turkey but she isn't budging and I don't want to give her more reason to be upset. In her mind she can't do the things she wants without me, but she never lets me try to teach her to do things on her own either. I don't want her to wait to learn the hard way when I'm gone but I'm not going to force it.