I built one out of an old elevator –
It is lifted with airbags. Everything you need to build this is available from Frightprops. They even have tutorials on their website. You will need to be able to weld to make it safe. I think I have about $3k into my elevator. But about $1k of that is the gilder fluke controller that runs it. Mine is pretty elaborate with lots of lights and audio. Start at Fright Props website and go through all the tutorials. You tube and pics.Mine will lift 6 people no problem with only 2 airbags.