we used to dog sit various other people's dogs, my cousin, some good friends.
We let it be known that we were happy to do it.
So we had nice, well behaved family pets for 1-2 weeks at a time.
My kids especially loved those weeks.
I always had the brunt of the walking.
For about 6 years, I said no way are we getting a dog full time, I know how much work they are etc.
Then kids got older, and after one visit from my cousins dog, I started to chaneg my mind a bit.
So we went to the dog rescue and fostered dogs, on the basis that you can always say no, and the dog is temporary.
Not so great as dog sitting as they were all rubbishly trained (being rescues)
But dog no. 4 sort of stayed and didn't go home! But as the person doing all the work, I had to be 100% on board.
I tell this story because I think it is only with an actual dog that you and he see how much work and if you are up for it.
You cannot do it if one person in the family is not happy.