I would check to see if having ducks is legal in your area. I'm originally from the chicago suburbs, where it is illegal to have ducks, but moved to montgomery after we got them where it is legal. If it's illegal, i'd go with a quieter breed, otherwise your neighbors could call the cops on you and have your duckies taken away.
Be forwarned that runners can be very skittish. scare of everything... they are one of the most skittish of breeds. if you want to be close to your ducks (like they want to come by you and eat from your hands) you have to handle them alot, and maybe consider keeping them in the house often... mine are in often... they have a indoor coop and an outdoor coop, and a small living area pen by my patio that has tons of toys and pillows in it. we spend a lot of time being very close to them (picking them up and hugging them) and they are still very flighty...