Not being unreasonable at all, I would like on laying eggs 4-5 times a day. ;-)
So you can keep Chikens anywhere pretty much. You would need a good secure coop and a run and a nesting box or basket with hay or straw in it.
I don't have a run becose mine are completely free range.
Make sure you keep a few, so they will have company, I always keep mine in odd numbers.
They need food,- corn, seeds, any ready mix food, grit, weather
There are a lots of quiet breed out there and some breeds lay eggs more than others, some of them hardy some of them not.
Have a browse of the photos and see what breed you like and what breed is the best to keep in your client.