That might have changed in 10 years (and the economics might differ for a small place), but when the place I was working was looking at switching from Perl/Tk f

That might have changed in 10 years (and the economics might differ for a small place), but when the place I was working was looking at switching from Perl/Tk for internal tools, they went with Python wxWidgets over PyQt4 because of licensing cost even though Qt would have been a better fit. They eventually went with PySide when that got released.