Word of mouth is the best. If you had past haunts that turned out well you shouldn't have a problem but it does take years.
Forget cable, no one really watches tv anymore.
Facebook targeted to you location should be pretty cheap, do not do clicks do the impressions, much cheaper.
Radio on a popular radio station. Offer to take canned food for tickets as an option and you can get a spot for free because it is community based....Even if you give a percentage to a charity cause will get you in the door.
But really, gorilla marketing with posters and flyers works great!
There is a site on the net that will do posters for 3.00 each, Think it is called shortrunposters.