I doubt they'll lose their house over one plant. Especially if they don't know, unless they have a "past". I'm sure they'll get a nice fine, and depending on his age and state that he lives in, he'll at the absolute least get one too. You should check and see what the state laws are joshlandry, some states have much harsher penalties than others. Where I live, under 5 plants is 1-3 years in jail.