my only warning is that chickens are addictive. I'm always on the look out for more.
I have 5 and get 3-4 eggs a day (my 1 chicken only lays once in a blue moon I should eat her but can't bring myself to do it, so she is my garden pest controller)
Once you've had your own fresh eggs you'll never go back to supper market eggs.
They are not great if you are garden proud, you will need to have a bit for them that you don't mind them trashing, if you don't have room for an ark that can be moved around. Mine free range a lot.
There is nothing nicer than a happy chicken scratching around the garden, and if I am feeling stressed I go and talk to them, and yes they talk back!