For exactly what? Show the lowest cost provider in "traditional finance" and the cost using some blockchain for an end to end transaction that someone actually wants to do. What you are going to find is that the underlying cost structure for a few updates to a few relational dbs is about zero. The fees paid for some transactions having are a result of using the most convenient method possible. With a little bit of elbow grease you will find very cheap providers of everything in traditional finance, they'll just be a little more annoying to use.