Upon accepting the job, the player receives a custom weapon similar to the harpoon with 1 point of damage (or -1), representing the pest control equipment. This job can be done while cooperating with other players.
A location is assigned, always an unowned/custom/unregistered property. There, the player will /enter. These locations would have 3 possible spots to spawn an object with collision such as the ogras, that upon being shot with the pest control equipment would register the completion of the task (and then displaying the next location while awarding with small payment). This object could be represented by one of the existing models or a custom one, such as ID 530 (Jellyfish models that show up in the ocean).
So, each place has 3 possible spawns for the object, when players get in they also have to look for it. (One or more could spawn in each location). When cooperating, one player can drive the other to the location or both can go look for the targets, and then sharing the payment through normal RP and /send.