Like many before me have said having your own chickens is not going to save you money! There is a thread here on BYC that is titled something like, What did your first egg cost you? It is so true.
I love my girls (even the roo that I never wanted)! It has been very rewarding and sad at times.
I like how people that do not have chickens or have never raised them are the most informed about them!
If you never picked up after a dog or cleaned where it sleeps it will stink. This goes for chickens too. If you have to many chickens for your coop for it size then you will have issues from, injuries to stinkyness.
My kids have been involved from the chicks arriving to feeding & cleaning. They have learned so much about raise animals, good & bad, happy & sad parts too.
My biggest issue was that I wanted one of each breed.
Good luck and you are in the right place to learn and to make an informed choice about raising chickens.