I do a haunted Garage every year and have some Ideas for you. I have a two car garage and find it too small! So I came up with the perfect fix. I added an addition. NO NOT WHAT YOU THINK! A temporary addition! What I did was this. I bought eight pieces of 8'x2" pvc pipe ($30.00) and some 4mil plastic sheeting ($39.00) I stuck some 4 foot rebar in the ground on each side of my driveway and slid the pipe over them. I then attached the poly to the pipe to make instant walls. I then sunk a few pieces of pipe in concrete in buckets to line up the middle of my driveway, and plastic sheeted that. In about an hour and $69.00 I doubled my space! Down the first hallway, I added strips of cloth dyed with RIT whitener and brightener. This makes the cloth glow like crazy under a blacklight. It is very disorenting! Once in the garage, I put some of my cooler props and animatronics. I set up a funeral home, an autopsy room and a morgue. I made a freezer panel out of plywood ; A sheet of plywood about 4x 6 and put two "freezer doors" out of more plywood, Handles and some temp gagues. Easy and cheep. HOPE THIS HELPED!