If you need to disappear, you call Best Quality Vacuum. You ask for a new dust filter for your Hoover Max Extract Pressure Pro Model 60. He picks you up at a time and place, if you're late he's gone. You have to pay him $125,000, not a dollar less. He takes you to the vacuum store and stashes you underground for a few days while he sets up a new identity for you. He then takes you to your requested place in an empty propane tanker truck. He'll check in on you periodically.
Some people have been theorizing that the vacuum guy will show up again based on how Kim took note of his business card in the vet's black book and the teaser for the finale where Jimmy mutters the vacuum line a couple times. I remember the producers saying they filmed everything they needed to before Robert Forster died, so they could be sitting on a scene with him, knowing how they want the show to end.