Gumby's aunt, Gumbetta, along with her husband and children, are visiting Gumby. It seems that Gumby's uncle got a new job nearby, and they're house-hunting in Gumby's neighborhood. Unfortunately, the Blockheads have a real estate monopoly, and they won't sell a house for less that half a million. Gumby decides to get out his Groobee and start cranking out houses for cheap, much to the Blockheads' dismay. To retaliate, they spray the sawdust that the Groobee feeds on with pesticide (illegal ones, no doubt) that make the Groobee drunk, evidenced by the strange buildings he makes. Of course, they're caught, and the sawdust is replaced, and Gumby makes a killing selling houses for as much as $9000 with practically no initial investment.