disabled person

Q: I want to make an app for disabled people. I want to make an app that uses text-to-speech and speech-to-text function. Text-to-speech has a robotic womens voice, so is it permissible for males to hear such a voice? Is it permissible for me to launch such app and sell.

Secondly, I want to make speech-to-text app for the deafs so that deaf can receive incoming calls, subtitles will appear, so is it permissible for me launch such an app? If any woman is calling, so her voice will be translated into text form. I think this background process will also be robotic. Is it permissible for me to launch such app?

Q: I got to know a person with a rare illness who is bedridden for years. I am willing to marry him but my parents consent is doubtful. Can I marry him to help him to protect his chastity? Please advise me on this.

Q: I have been told that it is permissible to perform tawaaf on behalf of anyone, regardless of his or her status. However, someone else has told me that this is only so, if the person on whose behalf we are offering tawaaf is invalid, poor, too old or deceased. Please clarify.

Q: I am disabled in a wheelchair and I am paralyzed. I recently read a answer that a person that has a urine bag or permanent catheter cannot lead a Salaah. My question is am I allowed to go to the Musjid in my wheelchair, and I have a permanent catheter with a urine bag on my leg. Is it permissible for me to perform my Salaah in a Musjid?