Not a bad idea, Propane weed burners are like $20 at Harbor Freight (before coupons). I am not so sure I would go to the extent the author did for building the housing, But I do like using this for the burner. Its not as cheap as building one from scratch, but its a bit more safer than using a homebrewed one.
https://www.instructables.com/id/Make-a-Propane-Forge-for-50/