Some neighborhoods in Paris are more accommodating to “rollers” than others. (By rollers I mean to include children in <<poussettes>> as well as folks using manual/motorized chairs, strollers, walkers and canes or sticks. The neighborhood around St. Sulpice in the 6th arrondissement was a surprise to me in this regard. Here’s a nearby bus stop for five lines (once again **all** are accessible).
A nearby hotel added to the possibilities by having an truly elegant and beautifully accessible room – ground floor, sufficient space, unobstructed WC, etc. Things are looking up. Allons-y!