Hey Peeweepinson, why don't you turn your garage into a psycho's victim-demembering-lair dining room?
Let all your stuff and tools such as chainsaw, hammers, pipe wrenches, saws, etc. covered with blood (and don't forget to widely spray the floor too), some bloody butcher apron and maybe severed body members props.
I know this may sound as a cheap or the lazy man version, but that would spare some time to prepare the rest of your haunt and could be part of the mood don't you think? Moreover, if you do it good your guests would be so disgusted they won't eat anything! (just kidding lol)

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