I got Rhapsody in Feb. 2006, and then had Tiger by the following April. We are now getting our third little boy in June.
We will eventually get at least one more; but my next one I really want to try the show ring with. So it'll probably be a couple years before our I find the 'perfect' show dog for me.
So I say, get one now. I don't regret it. I take them both out on leashes attached with a coupler. Now with the third, it'll be a little tricker, but I was already planning on giving my oldest child more responsibility on our walks. He's been begging to walk Tiger, and I think Tiger's trained well enough now so Jacob shouldn't have any troubles.
Good luck!!

Jess