[JeffHaas]

Sounds like you should look for things that create atmosphere without needing a big build. So lighting, fog machine, some kind of spooky sound track, and the projector with a cool animation could make a fun effect without big props. Then some ghosts in the trees and a few jack-o-lanterns (plastic or foam pumpkins - carve them early and use battery lights in them so you don't have to make a bunch last minute) and you'll have a memorable yard.

Also look at all the various color changing or swirling lights, there are more available this year. They cover a big area and look great! Maybe put some jack-o-lanterns in a group with a swirling light on the wall behind them. Add a boom box playing spooky sounds. You get the idea.

 

[Mr_Chicken]

Not to toot my own horn, but it sounds like some of my projection effects may be good options for you: www.chickenprops.com