Our current dogs sleep in the kitchen, previous boy preferred the conservatory, then kitchen as he got older, previous to that a dog who preferred to be outside, he had a warm dry kennel but had to be tied up overnight for safety. Bad weather we had to MAKE him come inside.
Every dog we've had have been rescue dogs, but by-passed the system.
As long as they have their own bed and space I would think that would be fine. Ours loved their beanbags and made nest shapes, but some dogs could be destructive with them.
Be prepared for a long period of really settling in, you're unlikely to know their background. I think it has taken about a year before they've 100% settled. It must be very confusing/unsettling for them, however much we care for them, we know they're here to stay but what's going through their minds?
It may be best to keep it in one room at nights, until it settles in and knows where it should sleep.
Most dogs we've had we've had to go back to basic training, again that could be they've been confused after different homes.
Only time we got one from a dogs home I had to walk out in tears, all those poor dogs. i did go back, we walked a dog out and for some reason I calied him Jack. We decided to go home and discuss, we knew on the way home we'd be back, so did the kennel girl

, she was watching for us the next day, so Jack came to live with us for 11 wonderful years, he would always be with me.