The O1 is employer-sponsored. You need a sponsor. The filing fees will run up about 2k including expedited processing (which is usually worth it). You're gonna

The O1 is employer-sponsored. You need a sponsor. The filing fees will run up about 2k including expedited processing (which is usually worth it). You're gonna have to go through a quite thorough process of building up a detailed dossier making your case for the government to review. This can easily cost 5-10k, depending on your attorney and the complexity of your case.