Brothers who are in the path of Allah for Dawa & Tableegh have to travel one masjid to another after every 2 or 3 days & also if they are at their place they go for shab-e-jumma & weekly mashwarah. So it is difficult for them to finish Quran in one Masjid.
Answer:
It is not necessary to perform the entire taraweeh at one musjid.
Mufti E. Desai