I can answer to one bit of what you've asked. A single person would have been very, very unlikely to have rented a house. When I was a child, in the 60s, a single person either lived with parents until they married or, in the rare case that they didn't would rent no more than a single room, often in a 'guest house' i.e. multiple occupation dwelling owned by often a widow, who might provide meals in a dining room, or, at best, a bedsit, a single room in a multiple occupancy dwelling with your own cooking facilities in your room and a shared bathroom. I think a single person renting a whole house was pretty much unheard of, TBH.
Don't forget, back then, your living expenses were a much, much larger proportion of whatever your wages were - people had cheap and rare holidays, spent very little on clothes or entertainment, didn't buy luxury goods, at the start of the war there weren't even TVs in houses, they didn't really start until 1953 when the present Queen had her coronation, and one person on a street might have had a TV and the whole street went and watched theirs, and the idea of having your own TV took off. So attitudes towards money were extremely different to what they are now, and your rent or mortgage (I'm not sure how common mortgages were or what form they took) was the first thing that came out of your wages (weekly in cash usually, in an envelope), leaving what was left for food and bills and often nothing after that. Of course if you were in the Army etc you were paid - I don't know how it worked, but my dad was in the army and my mum at home with one and then two children (conceived on leave) in a council flat. I was born ten years after the war - just as rationing finally stopped.
I had three older sisters, neither of the two oldest, both born during the war, left home until they married, one way into her mid to late twenties. The third one stayed with my dad after my mum and then I left - now early 70s. She sort of retained responsibility for him almost until he died - but that's a loooong story not for here. HTH.