I did post a link to First Mobility - sorry, it's First Call Mobility - on the other thread - here it is again:
https://www.1stcallmobility.co.uk/produ ... air-scales
I don't have any connection with them but they are one company selling this kind of thing.
I should add that in the three years I was dealing with my brother, I made some wrong decisions. You should most definitely get advice from the Occupational Therapy department at your council. I do not know who would advise you at First Call Mobility. Some care equipment providers have showrooms where they might talk to you. I have not been to such a showroom.
My brother could originally move around a bit, but kept falling. Eventually he bought a wheelchair. It was too small, but easy to move. OT eventually contacted the wheelchair services department, who provided a bigger one. Three of our doors had to be widened to 1 m. so the wheelchair plus my brother's hands could fit through them. But the wheelchair was so heavy that he could not really move it himself. As he received disability living allowance, he could have paid to rent an electric wheelchair under the motability scheme. But he was getting very confused and we never applied for one. He could not sit up on a motability vehicle so he could not go out. He went to hospital through double doors into the garden, and we had to add double doors to the back of the garage.
The wheelchair which he sat in for a few hours a day was not suitable, but OT didn't tell us that. One day when I was out and the hoist broke down, he was left sitting in the wheelchair and decided to throw himself on the ground because he was so uncomfortable. He must have hurt himself. We later bought a luxurious recliner. He had to be hoisted into it. He was sitting in the wheel chair for 2 years before anyone told us it was bad for his skin. He had no airflow cushion on it either. It was better for him to sit up and change his position though. I do not know if your mother can actually sit up.
Do you have careworkers coming in to help? You will hurt yourself if you try to move your mother.