Hi,
I have my chicks (4 wks old) in the house, we put down an old strip of kitchen lino and then each day I sweep and wipe it clean. It's a quick simple job, The have a run with a cover to stop them flying out, and they love it that they are part of the family. They come and "chat" to us, and feed from our hands. They have a shallow dish with sand and play in that.
To be honest, I love my set up and would happily (and most likely) do it again.
Good luck with the new chicks, they are so much fun, and so playfull. The fantastic thing about them being in the house is you end up spending time just watching them.