Runners make great pets. I have 2 of them.
Our back 4 acres are fenced with field fencing. Their duck house (a dog house kit from lowes with a custom built door) is in the 'duck yard' which is just a small fenced in area right off our deck that used to belong to the dogs before the yard was fully fenced for a quick potty trip. Not that it will really keep anything out if it gets past the first fence.
So housing - they need to be able to be safe at night (and the day, but locked up at night should be done too).
Food - I started with flock raiser until they started laying and then changed to chicken layer pellets. If I could get flock raiser in pellet form here, I'd use that, but the chicken food works just fine. I also provide them with oyster shells for calcium. Mine are also out all day, so they find what they want to snack on out there. But if I don't fill their food dish, I hear about it!
Water - something deep enough for them to dunk their heads is fine. But if you can provide something for them to swim in, you will see how much they enjoy it. I personally didn't like the look of their big blue pool in my backyard, so I built them a raised pond with landscape timbers. So now they have a nice sized pond to swim in and the dogs have a giant water dish with duck poop in it outside LOL
I love having my ducks. When I wasn't working, I was out sitting with them daily. Now, I get home when it is dark out. I did tell them hi when I got home today and the sun was still in the sky LOL
Runners have a great personality and if you raise a few at a time, they don't seem to be all that crazy. Mine used to hang out at the back door and knock when they wanted something until I booted them off the deck because I was tired of hosing poop off it. But they still come running each time we whistle for the dogs (it's great, the ducks listen better than 2 of the dogs LOL), when I walk out to leave for work in the morning (I sometimes get escorted to the garage and they sometimes stand at the gate and watch me leave), if they think I might have anything for them or just if they feel like being personable. They aren't about to run up and sit in my lap, but I consider them pretty friendly.
They can be loud. Mine went through a loud mouth phase and now with the weather cooling off, they are getting loud again, but not all the time - just when they want something or have something they think the neighborhood should hear. They usually just quietly chat though.
I still want a pekin, but I love having my runners.