I do want to do it for a living, but I don't make any money at it. :P
So it's a labor of love.
It's a lot of work, and though it is definitely worthwhile it's also definitely not easy whatsoever... I mean, it might seem easy to just plant a seed and pick it later, but you have to fight the weather, animals, disease, customers, etc. all the time.
I grew up with it in my family, as in my dad always grew large amounts of produce, and there were horses and cows around when I was very young. But, they eventually grew away from it because of hardships etc. We had equipment left over which helped. But, it's definitely possible to learn. It really helps to have a mentor, though, and I was glad to have people around me who knew at least something about it.
Chickens do better in groups of at least a few. I've never heard of anyone keeping one chicken. It can probably be done but I know that even when I have an injured chicken inside to doctor it up, it does not like to be apart from the others. I will often put a gentle one in with it to make it feel better.
They cannot be taught not to poop inside the house. However, there are specialty products sold such as Chicken Diapers and Crowing Collars and stuff that make it possible to keep them inside the house if desired. I wouldn't recommend it in general, though. They can be very dusty/create a large amount of dander, and I feel they just do better if given outdoor space. I don't have a barn anymore, it burnt. I just have a chicken coop out by the garages.
My preferred hatchery is Mount Healthy
http://www.mthealthy.com/
I advise strongly AGAINST Meyer Hatchery, they will reimburse for problems BUT the birds I've gotten from them have been sickly and spread disease into my flock.
I don't have a lot of experience with other hatcheries but some common ones are Cackle Hatchery and Murray McMurray.
Hatchery birds are bred for utility and are usually not up to breed standard and cannot be shown. But they lay better than, and are a lot cheaper than, birds from a breeder.