First off I’m so sorry for your situation, and I think this is a really awesome and loving thing to do!
I would stick with 4K and whatever frame rate you feel like. I personally prefer higher frame rate but if you’re going for a cinematic feel then stick with 24fps. I wouldn’t record in apple ProRes since it’s proprietary. While it’s unlikely, it’s possible apple (or apple ProRes) may not be around in the future, so not using it keeps it as compatible as possible. As for file formats, mp4/mov is the most compatible right now, but HEIC SHOULD become the standard in the future. I don’t think you need to worry too much about that.
First off I’m so sorry for your situation, and I think this is a really awesome and loving thing to do!
I would stick with 4K and whatever frame rate you feel like. I personally prefer higher frame rate but if you’re going for a cinematic feel then stick with 24fps. I wouldn’t record in apple ProRes since it’s proprietary. While it’s unlikely, it’s possible apple (or apple ProRes) may not be around in the future, so not using it keeps it as compatible as possible. As for file formats, mp4/mov is the most compatible right now, but HEIC SHOULD become the standard in the future. I don’t think you need to worry too much about that.