You forgot another factor to consider:
6) Shovel and suitable plot of land to plant said home invaders.
If shovel is (6), then shut up is (7).
If it’s nice and warm out, just pop them in a nice, mostly sealed plastic tub full of water, with 20-30lbs of soda ash from a pool supply store. Give that a week, then with clothespin on nose pour down drain. After rinsing off the clean bones, immerse them in the empty soda ash bucket full of hydrochloric acid toilet bowl cleaner. Give it another week and you are done. Be sure to dispose of any tooth fillings.