I need a handicapped accessible bathroom

This is my princess Selena. Selena is 11 years old and has quad cerebral palsy, an uncontrolled seizure disorder developmental delays and failure to thrive. Selena has an IEP placing her at the mental status of a 6 month old baby. She is 100% tube fed. She can't sit up, wal, talk oreven hold thinks in her hands. Selena still has poor head control.

Since Selena is getting bigger and bigger it is starting to get very difficult getting her into the bathroom to get her a shower. I am afraid that while walk through the bathroom door she is going to hit a foot, shoulder or something. My plan is to take the second bathroom and equip it for selenas need. I need to be able to put Selena in a lift and roller her right to her shower chair instead of carrying her. Selena love the water but we find ourselves giving her a bed bath most of the time. So we are trying to get a handicappped roll in shower and posibly a large tub to do water therapy with her. Thank you everyone for reading about my angel.