Companion Care Needed

My family is looking for someone to help my parents. They currently live independently and hopefully will for a long time. In the last 5 years my dad has lost his vision and my mom has become his sole caregiver. We want her to be able to travel and continue living her life and not be worried about dad. We would also like this person to be able to help with suggesting and setting up assistive technology, like voice activation and blind captions. Most important, we need someone agreeable and easygoing because you will probably get yelled at a bit.