I'd say it depends on how you define freedom of expression. I can express myself in many ways which do not require money. I can talk, I can smile, body language, etc. Freedom of expression could be taken to mean that I should be able to do all of the above, without anyone stopping me.
Finance does enter into the equation from a libertarian perspective in the right to property.
My property can strengthen the way in which I express myself. At the same time,