Sorry to hear about your wife.
I, currently have been going through the same thing! In December, last year, i had a CT scan that revealed 5 tumors wrapped around my spine. They radiated them, and knocked them out of action. This has left me with the numbness down both arms, and legs (to my knees). My C6 vertebrae had completely disappeared & i had to wear a hard collar for 5 months.
I, also started looking at lifts, renovations, etc., but decided to just wait & see. Glad i did! While these numbing sensations (desensations?) are annoying, it hasn't progressed! Perhaps that is an option for you guys, just wait & see. No use spending all that money if it's not needed eh.
Best of Luck!!