.05 was a bit optimistic but according to another forum (which shall remain nameless) the main cost was the silicon and the rest was generally available as waste around you or in your garage/cabinets at home.
I would guess the heat source would also be another cost.
In any event being capable of building solar panels at home literally would drop the cost of ownership by taking labor costs out of the equation.
Now to figure out how to contact her so her materials are known just in case her tech gets bought out or supressed. This would liberate people all over the world.
Cheers
Ryan