Maybe confirm if a bump helmet would be sufficient for the class. Seems like a ballistic helmet probably isn’t necessary for your needs.
I went with a ops core fast ballistic helmet and looking back on it wish I would have went with a bump helmet as I only ever use the thing to run NV and even that is a rare occurrence as I don’t have private land to shoot on. I started out with the thought that more armor the better. but having used the gear I realized heavy gear is impractical for a single person defending a home and not all threats are bullets. Criminals carry knives, hammers, tasers or just their bare hands, for those threats mobility to dodge, deflect and dominate is important and is hard to do when carrying 50 lbs of gears. I am rebuilding by gear and guns to be ultra light / minimalist, all designed around fast reaction civilian home (maybe civil unrest) setup.