Tacrolimus ointment and cellcept/mycophenolate did pretty well for the tightness on my skin and hands. Also, getting cleaning brushes with rubber detail nubs has been a lifesaver. Not sure if I personally would want a massager because I know that using my hands is what makes them swell the next day, but I'd be willing to try one.
From personal experience I can only recommend budget hand relief ideas like some arthritic "handy helper" gadgets to help make all regular tasks easier.
I use all of these things listed below nearly daily and they help a ton...
Steering Wheel Hand Assistance Knob
Foam Tubes To Help With Grip You can cut these and put them on anything she might need to grip, especially if you get ones with a range of different diameters.