Been thinking about this a lot recently. I've never owned a dog myself but grew up with them.
Our working patterns mean that dog would only be home alone for 2 hours in the day.
DH could walk morning and me in the afternoon.
Have nearly 5 yo and a cat, so dog would need to have been tested with these.
House and garden none too big so dog would have to be small to medium sized.
We can afford insurance and food.
Have good friend who llives locally with her own dog and we have discussed reciprocal holiday arrangements and she can also walk if we were ever out for longer. This means dog would need to be Ok with other dogs.
Anything else?
Dog can sleep in spare room.