We did it (well sort of, in progress). Not all that easy, but definitely worth it, I think. We purchased an Echo Show for my Mom. My sister can be with her and her and I pretty much have my Mom's setup. I created an Amazon account for my Mom, she had gmail, and I created a gmail voice account to link to her Echo Show. Something's are kind of klugy, I have to delete my Alexa app on my phone, reinstall it, and login to my Mom's. Being on my Mom's, I configure who we will allow to contact my Mom's Echo Show (just us kids and grandkids). I don't think we'll give everyone dropin - my Mom can answer the Echo call. We think, we'll see

My sisters and I will be able to dropin if we need to.
If people don't have an Echo Show, they can install the Alexa app on their cell phone and call my Mom's Echo Show (if I have given them permission). That will allow them to do video calls with my Mom. Sure, we could have done FB Messenger, Zoom, or Duo. We have done them all. Usually somewhat comically - she'll have her camera pointing at her floors or walls in stead of her face, or off. I sure think the Echo Show will be an easier mode of communication with her. Next up, I think we can do zoom calls (something they are just rolling out for the Echo?). I will report back as we maneuver through that.
(Side note - about not being able to find her cell phone or turn it on -- realized my Mom wasn't finding hers because my sister had gotten her a new case with hearts and diamonds on it, she wasn't realizing it was her cell phone sitting on the table when I'd call and ask her to turn it on for a FB message call).
We are considering putting and Echo Show in her living room, also, currently just have one (an 8") in the kitchen.
Nothing brightens my mother's face more than seeing her grandkids or great grandkids.
Thanks for posting this information, hope your Mom is doing well, Laura!
@Cornell
Sandi