With group courses, you serve multiple people's needs at once. You may still offer some 1:1 time as part of the program, but you'll leverage those hours to give (and get) maximum value, and offer your audience affordable access to your services.
The group setting can be a great way to differentiate yourself and create an offer that really stands out.
Additionally, the Cluster's collaboration gives your members a chance to see things from different perspectives, and get an extra dose of support and accountability which will help them achieve the results they are looking for.
Check out What kind of learning experiences can I create with Clustered?