Some cities have medical needs items for free {a charity/ volunteer /non profit thing}- we found out about it when BIL was in late stage cancer.
A coordinator or case worker at the hospital told us about it.
That was in Stockton CA, but I'll bet other larger cities have something like it too.

We were able to borrow a hospital bed, wheelchair, bed pan and foam wedge - when the things are not needed any longer you return them.

Thrift stores sometimes have nice walkers and rollators etc