It’s a trade off between video quality and bandwidth but you can set the ffmpeg parameters to the bandwidth you want, more or less. If you have 2mbits up you can do ok. Motion detection can help if it’s for security and not much is happening most of the time.
Staying in and keeping fighting is a lot to ask from a guy in his condition. Maybe he could drop out and keep fighting, or possibly stay in and quit fighting. Those would both be easier, and it doesn’t much matter at this point anyway.