I know you got a lot of info here already. But I will tell you my experience. I wanted chickens for eggs to start and since have gotten meat birds too. I had never raised any livestock at all. I have only in my life had cats or dogs. So it was all new to me. It was MY idea and experment to try, my husband, though he raised many animals in his time, did not really have any invested interest in raising the chickens. He has since come around more to them and helps with them more. I think that in a minimum you can try it. You don't even have to build a coop, yet. If you are in a relatively low predator area, like me, and have an old shed or other enclosure to house them in, it will suffice until you decide you want to keep them or not. I still do not have a "real" coop. When I got my first, I housed them in a kids play-yard thing with a makeshift roof. A dog came into the yard and killed some, so that made me start thinking about a better, more permanant home for them. Besides, cool weather was heading our way. So we have a 10x20 canopy and I rigged it up with chicken wire around the inside as well as the walls to make sure no one can get in or out of it. They have been there since. My hubby tried to build me one tractor (moveable chicken yard) with some free wood from craigslist, its too heavy for me to move alone, but with a few more additions, is actually a good, small housing for something else...So point being, you can house them almost anywhere outside of the elements and safe from predators. My canopy is just like a coop at this point, they have bedding, roosting, nest area, and the baby chicks are in their own box inside the canopy too. Once we move to the country here in a few months, I know this will no longer suffice as there are coyotes as well as other predators that I will have to look out for. But until then, I have no plans to build a coop here where we are staying...
As far as the time taken, it is very little. I go first thing in the morning to open up the "coop," feed, and water the chickens...the big birds have a large feeder and waterer, so that makes it very easy, I just top off the waterer and put the feeder out for them, the babies are a little more time cosuming, I add more bedding, grab the feeders and waterers and fill them while my older hen tries to steal "baby" food
I then add it back to the brooder and watch the lil ones go crazy...
the big birds run outside first thing when we open the coop to eat their fill of grass and bugs...and they eat a lot of them too, so food costs go down. I go again when hubby gets home to freshen the water and food for the babies. At sundown, most or all the birds are back in the "coop" and I go and water the babies one more time and close up for the night. As needed, I add straw to the bedding for the big birds. About once every two weeks, they get a fresh thin layer. Haven't yet pulled it all out and started from scratch (only have been using straw bedding throughout the winter), but when the time comes to do so, I can use the straw in my garden.
Weather or not you decide it is for you, they are a lot of fun. Really. I enjoy sitting by the window throughout the day and watching them, or go down and seeing their antics. I have, in the past, tried to round my turkeys back into their "coop" and had all 10 of my chickens running behind me...made me laugh...I love raising them from babies because they are easier to handle when they are used to you more. Out of all the chickens we have gotten, I have had two sets of babies from local people that were anywhere from 4-6 weeks at the time of purchase and two sets of hatchery "day old" chicks, the older ones were a lot more skitish and the hatchery ones have been a lot calmer and friendlier. So, if you decide to get chicks, very easy to care for..no need to buy a whole lot of supplies, I got an old produce box from the grocery store (I went to Costco since they had the BIG boxes) its a kind that sits on a pallet and is the size of a pallet and about 4" tall. Already had reflector lights, but had to buy a few bulbs, just bought my first set of real waterer and feeders, used plastic storage containers before (warning they WILL poo in it though), bedding is realatively cheap, and lastly food, which too isn't much...Starting out either with chicks or grown birds does not need to be elaborate. Start with buying as little supplies until you know. The chicken waterers and feeders, for both big and little birds are new to me, I have gone at least 6-9 months without them.