Turkey trip - advice wanted please!

I’m planning a trip to Turkey hopefully in a few months. I will be going with my husband and my mother.

My mother has become quite weak in the last few years. She gets tired very easily and can’t walk fast or for long periods of time.

Considering there is SO much to see/visit in Turkey, do you think it will be possible for us to take my mother? My mother is saying she does not want me to waste my money if she will not be able to keep up.

Is it possible to get to most places by tour bus to minimize the amount of walking or will it still require a lot of walking?

I really want to take my mom because if is my gift to her. She will go for heart surgery in the fall and I want her to have one amazing trip/memory before her surgery because everything is in Allah’s hands after that.

Thanks in advance for the help.