On the last points, I'm actually fortunate enough to have a four bedroom house, and our two girls insist on sleeping in the same room. This was started out of necessity as we had leaks in the top floor bedrooms. But as soon as we tried to move the little one out into a room of her own, her older sister objected in a most vocal manner, and does so every time that she wakes up alone, usually because the little one has had a rough night with a cold or something. Currently they're three and two years old BTW, only fourteen months apart in age...
Anyway, the upshot is that we've got a spare bedroom with a double bed in it, this was supposed to be one of the girl's rooms, and we've got a 2nd spare bedroom that has a fouton in it, and a great big desk and lots of shelves, most of which are filled with my books, figure cases and various boxed sets...
The only downside of this is that when I do get down to some painting, my wife then complains that I 'disapear upstairs', which is true to an extent. But we don't currently have ant coffee tables large enough downstairs and I don't fancy spending half an hour of my painting time moving all my stuff downstairs, etc...