…why I was asking about ISS crew capacity, this is why:
The new space station would have an initial design life of about 15 years, Orbital Technologies officials have said. Soyuz spacecraft would ferry crews to the station, while unmanned Progress vehicles would keep it stocked with supplies.
The station will also fly in an orbit about 62 miles (100 km) from the International Space Station and in a similar inclination, or tilt, to make any transfers of crew or cargo between to two stations easier, the company said.
…The Russian space agency’s chief, Alexey Krasnov, added that a commercial space station could serve as a backup for International Space Station crews.
“For example, if a required maintenance procedure or a real emergency were to occur, without the return of the ISS crew to Earth, habitants could use the CSS as a safe haven,” Krasnov said.
If NASA was smart, they’d be buying a Sundancer or two from Bob Bigelow for the same purpose. With these kinds of co-orbiting facilities, you can have a true lifeboat, that doesn’t need to be able to enter. It might be Dragon based, or something else, but it’s basically a pressurized tug with life support and hatches (and perhaps an airlock), but it lives in space. And the ridiculous requirement that the entire ISS be capable of evacuating all inhabitants all the way back to earth goes away.