The local paint place to me where I took my MSport bumper to be painted has some concurs 'classics' in the reception area, including an Austin 1100.
When I saw it, I was taken right back to my childhood days when Mum, Dad, me, my brother and my Gran used to get ourselves and all our luggage into it. I think we may have used a roof rack too.
On that basis, I can't see why an F22 wouldn't do the job as its a lot bigger than an Austin 1100.
I think day to day, you'd have no problems. My wife had an A3 Saloon courtesy car the other week, and it was perfectly fine for us and our little one, as well as the dog. They're a similar size to an F22 aren't they? The three doors shouldn't be an issue for occasional use.
For holidays/weekends away and the like, a roof box would make things much easier. We still use one in mine or her regular A3 sportback. I appreciate a roof box and a coupe don't go too well for some, but better to have the option should you need it.