Any given poster here (barring extremely rural members) should have 3 post offices minimum within a 30 minute drive

Here in Chicago it is 10+ from any point

Hitting each one but once a week should give even someone with only 3 reachable post offices 12k minimum a month

You really can't get greedy or hit it too hard but played conservatively one can do ok using the PO

It isn't the cornerstone of my approach but it is an important part