Here is a picture of the prawn pullers my buddies and I have been building.
Winch: $49.00
Scotty spool: free (find an old manual that nobody wants)
Front pully: $18.00
Power switch: $6.00
Scotty downrigger plug: $7.00
Scrap aluminum: $18.00
Total: $98.00
Labour: all in good fun.