What type of Sharing Center you want to build?
Sharing Box
Sharing Bulletin
Sharing Fridge
This purely depends on your possibilities and what is the most suitable for your neighborhood. We believe that members of the community know the best.
Sharing Box is the easiest to produce, simply by using a piece of furniture or approaching a local craftsman to build a masterpiece to impress the world.
Sharing Fridge is the most difficult as energy supply needs to be assured. As it is also most often used for sharing a perishable food it requires additional measures taken to assure harmlessness of the shared items and it is the most challenging from the legal perspective in some regions.
Sharing Bulletin is a nice addon you can add to every Sharing Center to make it possible for a community to share the information.
You need to also assure that you are not breaching any legal restrictions and mainly that your Sharing Center is not putting anyone in danger.