As someone who has had several disabled or injured house chickens over the years I can PROMISE you, it will get old so very fast. I would like to highlight one of the most unpleasant parts of having a chicken in the house. CECAL POOP.
It matters not that it's a small bantam, all chickens have cecal poops several times a day and they STINK and they are messy. Sure you can put a diaper on the chicken to contain the poop, but you better be prepared for your room to smell like someone just took a hot steamy dump in it multiple times a day. Cecal poops are like the chicken version (in consistency and smell) of a bad case of severe diarrhea in a human. It's juicy, gag inducing, and rank. If your chicken is in a diaper it will stick to their feathers and now you're scrubbing a crusty butt several times a day. They can also get ammonia burns on their rear if not changed frequently.
Most, not all, but the vast majority of people who are posting cute little videos and blogs of their house chickens show you the romanticized version of the experience. Some of them may even be posting a cutesy video for clicks and then the chicken gets shuffled back to the coop. I have kept chickens for about 30 of my 40 years on this earth and I promise you, a house chicken is something you only want to deal with when you're healing an injured bird. It gets old so very fast.
I currently have a disabled chick that has spent 8 weeks in my house, he is small, but I was having to clean his enclosure 3 or 4 times a day due to the smell. He's not inside because I want him to be, but because he has to be. He's a sweet and adorable little fella but you can be halfway across the house and that cecal poop smell comes wafting through and it is so SO bad. I tried putting a diaper on him (because he kept getting poop on himself) and it would shock you just how much they poop for being so small. You have to change it many times a day. And diapers really accentuate that ammonia smell. Inside chickens STINK no matter what anyone says, they stink!!!
I know we all sound like a bunch of naysayers but we speak from experience when we collectively say it's not a good idea. And trust me when I say I get where you're coming from, and it feels like everyone is beating down your dream and popping your bubble. I have been there. And sometimes we just have to try it and learn the hard way, I know I sure have many times over the years. But take it from someone currently dealing with an inside chicken it is not even close to what it's cracked up to be. It's a ton of work, stink, dander, and constant cleaning and IT GETS OOOOLLLLLLDDDDD. There are no days off. There are no outings with friends. There are no trips out of town. It is a constant responsibility that chips away at you one cecal poop at a time. 
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And I didn't even mention their propensity to scatter their food everywhere, eat things they aren't supposed to, go places you don't want them to be, and just in general cause chaos in a home environment.
My best advice is don't do it, but if you do you'd better have a backup plan to either re-home the bird or have an appropriate outdoor space available. Your best bet is to have a small flock that you spend time with every day and can bring one inside to hang out with you when you're feeling like it, and can return them to their own abode where they can live a happy chicken life outside where they love and want to be the most.