Help Protect my family

Really need help to protect my family, we had pedophiles hit on daughters and quite a few in area, we have had 2 shootings that resulted in deaths in the last  year, and one of them was right across the street from my house. We really want to raise money for a security system. Or maybe a firearm Please help  I have 3 daughters, and I had Brain Surgery, and I am on disability, so my money I get barely covers bills. PLZ I beg you please help.