Should I make Qasar & jamma' if I move in-between city or islands in the same country?

I do know that when travelling more than a said distance it is permissible to perform Jammu(combining 2 prayers) and Qasar(shortening prayers) accordingly as per the guidance. But what I would like to know is that; How about if you're working abroad and you're completely away from your home town? In addition to that; I travel in between the city too. As in, I travel from one island to another every day for work even though it is part of the same country. To make it more clear, I live in **Maldives**, a country which consists of 1197 islands if I'm not mistaken. Therefore, how will the prayers apply for me?? Can I shorten the prayers and combine or do I have to pray 5 times with complete raka'ats.?? This is just for my acknowledgement only & it can be useful for me at times to clear my doubts. But I do pray and still trying to pray all 5 times without performing any Jammu or Qasr. **To Summarize :** 1- How should I pray if I'm working abroad and away from family ? 2- How should I pray if I travel in between city and in between islands in the same country ?