We can't tell you how you should organize your business (as an LLC or another type of organization), or what accounting software you should use. These are complex questions that you can't get answered in a brief anonymous discussion on the internet. You need to sit down with an expert who can spend some time discussing all aspects of your planned business operation, including many details that you haven't provided here, and advise you on how to handle it. This is not something we can do here in this forum. And it's not just a tax question. There are legal issues as well.
