We recommend staying anywhere in the city center. Helsinki is a very walkable city and has a fast, cheap, and easy public transportation system. There are many affordable hotel and Airbnb options. For easy wedding access, we suggest staying in or near Kamppi, Kluuvi, Kruununhaka, Kaartinkaupunki, Töölö, or Kallio (Hakaniemi or Sörnäinen). At this time, we have not yet contacted hotels to get a discounted rate but we will look into this option as the big day gets closer.