The Rift should include a big room - sort it out Oculus.
There's nobody I know who has a spare room that size. Vive been room scale would have sold a couple of headsets, if it depended on a room that size here in the United Kingdom. Usually people with a room that size live in it and have sofas chairs ..etc. I'm thinking most people will have the bad VR room and just carry the settee and chairs out of the window when they are using VR.
Joking aside, I have a flat and purchased a collapsible bed that I place on it's side. This gives me an extra 3ft by 6ft area., so my total area becomes 8ft by 8ft and I don't have any problems with that size.