There is so much liability involved, it would be a nightmare to fabricate something. If the lady were to get hurt, never mind why, that could be a hugely serious situation.

I second the suggestion to get a walk-in tub.

I guess I'll continue this on the bathroom forum, since that's where the topic has become most active.

to handymac:
You may wish to clarify on my thread in bathroom forum - are you saying there's liability involved in posting instructions for an idea,

...that's a...
COMPOSITE (or not) OF:

Patient hydraulic life (Hoyer) by Advanced Home Care, used with nylon mesh split sling.
(problem is... might not fit in small bathroom)

Molift smart hoist...ditto...

Is Cressy patient sling waterproof?

Hoyer Bath Mount Adapter (problem is, no renovations are allowed, so is that required to use adapter?

WESCO Winch Lite Lift (see YouTube)

Building elevator for a fort (see YouTube)

Dumb waiter for bagged coal (see YouTube)

portable lift (see YouTube)

cup elevator - grain elevator

elevator winch

mechanical advantage pulleys

homemade "elevator":
video of guy who attached milk carton with cables to winch on ceiling of workshop. His kid got inside the carton & got lots of kicks from homemade "elevator