Wannabe
If memory serves, it was a long time ago I worked with PA31's
Navajo about 600kg
Chieftain about 800 Kgs
Obviously dependent on the sector, and these girls could still have the pax seats in at the drop of a hat. We had two chiefs and one Nav at National, they were kept pretty busy, but that was a long time ago.
As for the DOC's, no idea, but I guess you can pick them up cheap enough which helps.
Last time I used one was for an AOG spares flight to LYS. The aircraft had to ferry to LYS Bron at their expence to uplift AVGAS to make the return to the UK, that does not help the DOC's.
Still, AOG flights always will be needed, and big manufactures still have 'just in time' component cock-ups so good luck to CWC, there is money to be made if you can launch quick enough.
Think it was 1KG of documents for Emery Worldwide SEN-BRU to catch the transatlantic that was the least I ever sold a PA31 for. Stopped them loosing a major customer, so they footed the bill both ways.
Bored