I drove a vacuum truck for a time. It was a 40 foot long trailer pulled behind a three axle Stereling tractor. The tractor had a suction pump connected to the cargo tank on the trailer that would pull a vacuum in the trailer. We used to suck water, grease, even rocks from sewers.
Well that will do it. I want to find something that would complete the picture of a mcmansion with a Buick Toadmaster in the drive and a lawn with neat lawn stripes.
Hmm I think the largest machine I've got is the Thermax AF1 It's a little too big to sit on the 17" deep shelves I've got.
I don't know how large they are but the Hailey's comet looks rather big, and I think may go well with your vision.