Lyric discussion by Doxtor 

Cover art for Naming Day lyrics by Mountain Goats, The

I think that the protagonist of this song is living in a grow-house, growing weed. Thus spinning straw -e.g. dry grass- into gold.

Due to the inevitable paranoia, nobody is welcome. He let some friends in when he was setting up - they "fish-eyed and rubbernecked" at his equipment - but now, given that the house is supposed to look uninhabited (this also explains the goggles), they're not welcome. When he says that anybody who comes around is automatically a suspect, the meaning could be that he personally suspects all visitors, but also that they could become criminal suspects, under suspicion of being co-conspirators simple for turning up.

The sealed doors and windows add weight to this interpretation.

My Interpretation