This Homemade Ash Costume from Army of Darkness cost me about $45. I bought a broken chainsaw from a garage sale and took out the motor so it wouldn’t weigh a ton, then to Home Depot for some PVC pipe and rubber grommets to hold my hand in place. I got a screw on PVC top which I bolted to the bottom of the chain saw so I could take it on and off.
I used a bloody rag on the inside of the PVC pipe so when I unscrewed the chainsaw it looked like my hand was indeed severed. Took a belt and a tool belt and crossed them on my chest. A cheap toy shotgun from amazon.com, a blue button down shit from a thrift store, some fake blood and a little bit of make up and you done!