Leonov II

Another idea for the first rotating space station. Bigelow's habitat would be at one end, then a tether to a spent rocket part. Which reduces the need to transit between the two. Then when each new launch is made of tourists, workers, etc. a Soyuz type piece is added to the Bigelow habitat, similarly to the Mir. Slowly building a tunnel toward the center of rotation. A spent rocket piece can be added to the 'dead weight' side as needed. Once you are at the middle, a 4 way module can be added and 1 and eventually a second Bigelow habitat can be added. Expanding the zero g portion of the station, then launches can continue to bring Soyuz pieces to expand to the other end of the 'ladder' until at the end you add another Bigelow habitat. My understanding is one Bigelow habitat has the entire living space as ISS currently. So at 4 habitats and a football field and a half of Soyuz tunnel we could have conservatively 12 to 24 people, possibly a few more since this only counts the habitat space not the narrower tunnel. Beyond this you would just need connecting units to expand for more habitats.