Willie, I think Heather's already spent the guitar money on useless stuff like mortgage and food.
Every instrument "writes" songs in different ways. The two songs of mine that folks seem to think are the best "Voices of Struggle" and "Pitman Blues" are both hard edge musically and couldn't have been written on a softer more delicate guitar (like the little Martin)
When I really want to write something out of my normal style I go to the piano...simply because I don't know what I'm doing on it. Therefore...no cliches.
If ya get a chance send me a tape of your song.