All our dogs are house dogs - it's illegal where I live to keep them outdoors, and they wouldn't be thrilled anyhow. Old Dog is like 13 and she weighs 65lbs. She's ALSO the daintiest of the dogs, takes up the least space on the couch, almost never knocks things over, drinks from her bowl and eats her food without spilling, chews carefully, the whole nine yards. I can't help but think they're happy indoors. They always look so cozy and they still play inside - just in "safe" spaces where there's nothing to knock over.
She DOES get grumbly when asked to move out of her seat, but she's old and arthritic. I can't blame her for it - I grumble when I have to move too.
Costco has some great dog beds for really cheap if you need a good place to get one.