Typically, the financial regulator of each state puts out some kind of information on how much it costs to get a money transmitter license.
The NMLS (Nationwide MultiState Licensing System) also provides information packets on each state, and is usually well updated.
It just remains a bit of a spaghetti mess to browse through it all.
Here is a Summary Table of US Money Transmitter Licenses with respect to:
- US Money Transmitter License Cost (broken down by state)
- A Summar Table of the US Money Transmitter License Options (i.e. what options are available to you).