Shower for Vet

This 97yr old World War 11 Veteran can no longer walk on his own, In order to go to toilet or take a bath one has to lift him off his wheelchair onto the toilet or shower seat. We need to install a walkin shower with no lip so we can wheel him in on a bathchair without having to lift him. I myself am a 72yr old Veteran with a 100% disability and am having problems with my back lifting him