That's a gross misstatement of Citizens United. People do not give up their right to free speech by forming a voluntary organization (aka a corporation). We know this is true because we allow corporations and organizations like the New York Times, the ACLU, and the Teamsters unions to have a right to free speech.

As for money being free speech, the equivalence is that in general it costs money to publicize views. The FEC has limits on what you can do with the money (you're not supposed to buy jewelry or fancy vacations) and where it can come from.