Looking after someone who is old, deaf and blind with a broken hip can't be a picnic. What a fantastic thing to be doing with your life. Do you have any siblings to help you out? No wonder your options are limited to some extent. You say it contributes to your isolation....do you live in a rural area, or are you talking about that hermity pattern us alkies tend to find ourselves in?
Going to hit the sack. Look forward to hearing how you are going :-)