I , too, agree that you need to test. The main obstacles have been mentioned - entering/leaving the TC, and getting in and out of the cabover bed. Not all campers are the same.
I have mobility issues myself. But with some practice, getting in and out of the cabover proved to be easy. Good training, actually.
And the large assist handle works well for climbing in and out of the camper. We bought the torklift railing with the camper, but so far haven't had to use it.
Additional steps, handles or handrails could help with the cabover where needed.
Only you know what will work for you, and only after some practice.