You may be trying to figure out how often to host the live online classes. You can easily record them all and post them for people to take on their own time- as a way of bringing in extra money. How often you host live depends on your job, your availability and how successful your live classes are. If you can, try to get a survey from your potential and current customers to see when and how often they are interested in taking live classes. Once a week should be the goal unless you’re wanting to do it more often.  You may offer a series of both in person and live streamed classes (or in person and live stream for a larger audience). Ultimately, it depends on what you’re able to do and what you’re comfortable with. You may start with just a few students, but word of mouth can bring many more.