350 rounds a day is a lot of ammo, I'd like to be able to afford 350 rounds a week. Good luck with your plan, I hope it works out for you. I think there's a valid point to the rehab qualities of your idea but I think you might be better off lowering the round count and shooting say every other day at least in the beginning. When I was doing Physical Therapy for the herniated disks in my neck I was going a couple times a week. Go for an hour then rest for a couple days then go for an hour. I suspect you'll need to rest a bit after shooting in the early stages of this plan. I also would like to see how the equipment holds up to that amount of shooting and think you should keep detailed records on all the guns used. This may prove invaluable later on.