Pro Sites: Only displayi(ng specific Price Options?

Is there a way to default price options to be displayed?

Use case, I want to have everyone sign up for a Basic premium package, but give them space quotas to upgrade as they need. Also to create a premium level to make themes only avail to main site (although site editor i believe i can select inactive themes so this may not be needed).

I only want 2-3 plans shown, what can be done?