Make sure the bathrooms have pocket doors, rather than doors that open with a hinge. Getting around a door with walker is difficult. The best would be to find a walk through bathroom, with pocket doors on either end. Those are going to have the most space. If you can't find what you like with a walk through bathroom, you can always just remove the doors completely while he is using it.
2004 AllegroBay 34XB Nov 2017 Banks, Front & Rear Trac bars, Konis
Sold:'83 Revcon Prince 31' FWD GM Performance 502 w/Edelbrock MPFI, Thorley Tri-Ys & Magnaflows, 4L85E 4 spd