Cross bows & sling shots or wrist rockets work well. How about a sword made of Valerian Steel.
Not really. Cross bows can be lethal. Also compound bows. And sling shots can be good deterrents. Just practice with them. Better than nothing. Even cans of mace. Anything you can think of that doesn't require a license. I know a guy who trained himself how to use throwing knives & those Chinese throwing star things.
If you're married, have your wife get a gun license and buy some guns.
I even saw a video of a guy protecting his store by brandishing a chain saw.
Sounds like a Guardian Angel