A few things to keep in mind here:

If you are operating as a sole proprietor, you do NOT need a business checking account, you simply need a second personal checking account for all your revenue to flow through. If you are an existing business owner operating as an LLC, you can and should have a business account.

Keeping your books clean with a simple bank account that is ONLY for the money your business brings in and a PayPal account will make doing tax work a whole lot easier, you'll thank us later!