code: func (r Scale_Group) GetAvailableHourlyInstanceLimit() (resp int, err error) {
  	err = r.Session.DoRequest("SoftLayer_Scale_Group", "getAvailableHourlyInstanceLimit", nil, &r.Options, &resp)
  	return
  }
docs: // This returns the number of hourly instances an account can add from this point. It is essentially the same as [[SoftLayer_Account/hourlyInstanceLimit|hourlyInstanceLimit]] minus existing hourly instances and ones spoken for as part of a scaling group (as determined by the group's maximum). This number can be used to help determine a maximum member count for a new group to ensure it won't go over the account limit. This can return a negative value if the current hourly instance count combined with the unused-but-possible count (based on other scale group maximums) is over the limit.