Networking and involvement will help the station to grow, by helping the community at large. You have non-profit community organizations, go to them and explain Public Access, how public access can help them to promote their own outreach and service programs. Ask them what they need and work with them to find solutions. Access can provide the tools for their volunteers to use. Access can supply the medium to spread their message.
Access can supply the education to use the tools of television.
You may have to start out with a single room, and only have room for the cablecasting equipment and tapes. This would not be a bad thing. It would be an inexpensive solution which would allow you to grow. These buildings have space to work with, if you really want to plan of public participation and production you need more space than you could guess. If you have a large open area you can construct a number of special use sets.