Tread1
If it were my son and his buds. I spend every penny I could to try and help make their job safer. You can't put a price on a son. I know I'd without hesitation give my life for my son... and if he were in that position, I'd consider money spend on his squadmates an investment in his safety. This is because I know his life depends on his buds being there for him, just as I would know he would be there for them.
I have spent 4 years in the Army and 28 years in law enforcement, and I know they only give you what they have to, to get by. I have spent quite a bit of my own money during my career on equipment to make my job safer and to increase my chances of survival... so I was able to go home every night to be a father for my son. As I said... if it were my son, I'd do whatever I needed to get better or needed equipment to give him the same. It is an investment in his future. Not a guarantee... but what would be in my power to do.
I cannot express in words the feelings I have for what you are doing for him and his buds.