Some paperwork to filed and money to be paid. If you are a member of OOIDA, they help you with that. they will send a packet for Application for authority to you, and even offer to a lot of the groundwork for the paper pushing by giving the office staff limited power of attorney to sign off on all the documents which need to be filed. Takes less than a month. Unless you want to haul rocket fuel the process is inexpensive and relatively quick.
Then you're only remaining problem is to locate customers....
mike