most seniors i know off hates riding in sedans.

For OP, why not get a Van instead and have it modified to fit a small CR at the rear.
Vans like the Toyota hi ace LXV, Nissan NV350, Hyundai Staria/ Hyndai H350 are big enough to put a small restroom inside. You can also opt for its base model and have the like of Atoy's customize the van to put in a CR.