I like this idea that these expensive tools can just be available to everyone living in these apartments, it really does add a new meaning to borrowing a tool from your neighbour. I can see this method as a new way to getting to know people from your apartment block and build a communal experience out of what is usually a very non-engaging experience. Your boards are minimal and efficiently convey their messages well. My only suggestion is perhaps the PSS can include a workspace for the people to use these tools.
Your PSS definitely offers many benefits. It is ridiculous that everyone has to own a range of expensive tools which they may only ever actually have to use a number of times. In the situation intended, it makes a lot of sense to have a sharing system set up, to reduce unnecessary purchase and increase social interaction. I agree with what James said, that it could benefit from having somewhere to work, as most people wouldn't have an appropriate areas in their own apartment.
tool sharing is definitely a good issue to be addressing as owning all these tools per household is a crazy amount of tools that are not being used where someone, literally next door could be using it. if i was to make one suggestion it would be that it does look like a industrial product for suburban areas possibly could have been a little more friendly :) over all good job on the project and your successful PSS