A thought for your consideration. If your party has less than 4 members, consider joining an existing party that has four or more members. The larger group, even if some members depart will still get you the minimum monthly cost. You may be thinking that each party must consist of only 4 members, but that is not the case. The more members, the greater the chances you will be paying the minimum for an extended period of time. Just something to consider.
Thanks for your time