Well firstly you have to travel to the job site (lets say 5 minutes), wait 10 minutes for the duel and return to the Hotel. That's 20 minutes of exposure, quite an improvement to a big fat 0.
So, let's say you are watching a dueler.
The dueler wakes up at 0:00:00
At 0:00:01 you see he's awake (you're quick), and schedule a duel against him.
At 0:05:00 the dueler arrives at the job site, and starts his 10 minutes countdown until dueling a worker.
At 0:05:01 you notice the dueler is no longer in town, cancel the current duel, find where he is and start walking to the job site. Let's say you do all these things instantly.
At 0:10:01 you arrive at the job site, and your 10 minutes countdown until duel starts.
At 0:15:00 the dueler duels the worker who was at the job site, and starts walking towards the town to sleep.
At 0:20:00 the dueler arrives in town and starts sleeping.
At 0:20:01 you receive your duel report (the person you attacked is no longer here).
So, in order to catch the dueler, you have to be at the job site the dueler is going to, see he's there and schedule a duel against him in the first 5 minutes (assuming the closest hotel is 5 minutes away). It can be done, but is not fun. In case the dueler sleeps in your town, attacks players working nearby then ducks back into your hotel, you can stay in town and tell your workers to work only jobs 15+ minutes away (so the dueler will have to walk 15 minutes to the job site, allowing you to hit him before he arrives there, unless he splits the walk into 2 segments).
Also no looney is part of a town whilst finishing the adventurer series. If they are they deserve to be 3k poorer.
I never left town while completing the adventurer series (even when my town was 8 hours away).
- solution 1: complete quest, move to a nearby job or town (preferably job), from there walk home. Someone "stalking" the location won't see you there; you risk losing money only from someone randomly dueling you.
- solution 2: (which I used every time): walk to Mugridge and back. complete the quest 5 minutes before arriving back in town (or 1 minute) - works if you steal his loot, or you are sure you will win the duel.