i find this structure a bit odd. i would have gone for the following pattern:

    Billing::Plan.find_or_create_all_by_attrs!(
      standard => {1.month: 10, 1.year: 100},
      pro => {1.month: 50, 1.year: 500},
      enterprise => {1.month: 100, 1.year: 1000}
    )