Unfortunately, they'd still end up eating up ship cap for each system. They might fall under support ships since they have no weapons of their own besides the N-F2s, meaning the limit usage won't take away from main fleets, but I'd like that an administrator make the call.
That said, the design itself is praise-worthy in its elegance and ease of manufacture. Using the current system, it would only take one day to produce one, so a system could have a hundred of them in ten days.