Nevermind, duh, you said it almost immediately in post 1. 🤦🏻♀️
This is his first spring. Apache is, now, a teenager. He is going to be rather aggressive due to hormones. If at all possible, what I would do is wait to decide until autumn.
If your mom is not a regular care-taker, then he will treat her as a potential threat. Have your mom practice walking through the roosters while laying out food for them. After a while (mine took about a year to stop going after my family members) they should just see her as a bringer of good...
Is that all Apache is doing? Biting? Has he tried to flog you or your parents? Has he come at you with his feet? It could be that you are doing/wearing something that is adding to his frustration at not having his own harem. Or maybe it is the lack of having a harem that is getting him worked...
I have read through this entire thread, and like many people, I was frustrated and angry at the beginning. But now I am so very happy with your choice of caring for Apache rather than culling him. Your dedication and determination to help your pet survive is nothing short of inspiring. Keep up...