I see you're in Texas so I'll bet your birds go outside most days during the winter. I'm in Northern IN, so I have to have a larger indoor space if I keep that many.
I haven't posted my coops in a coop thread or coop article, but I have shown photos in the Indiana thread and the Natural Chicken Keeping thread.
In my original house that I call the "little house", I have vinyl flooring too. I just put wood shavings (from
tractor supply) down. I rake them around to cover up any poos, and keep building them up, covering the poos for a couple weeks. Then we take them out.
In my setup they go right into the run to build up a healthy deep litter. (My run gate was mostly open so they could range around...only shut them in when needed.) When there's not a permanent run, I put them either on the compost pile or garden depending on the season.
Looks like our albums are not back yet so I'll post a couple photos. We got this shed from Habit for Humanity if we moved it ourselves...if I remember correctly it was $250.
Then my husband did some "remodeling" on the inside so we have an area to walk in separate from where the chickens can go.
This is looking inside as we're working on it. You can see the vinyl flooring and part of the divider walls. There to the left is a nest box that we can go inside to open. All the interior walls are hardware cloth and are as predator-proof as possible. Nest box also has a predator=proof latch. That way we can leave the front doors clipped open during the summer both day and night since it was placed in an area with no shade and can get very hot in there.
Nest box from the chicken side.
Just inside we have 2 areas that can be shut off from each other for brooding or if a bird or 2 needs to be separated due to bad behavior or injury but still be in with the others.
This is the stationary run on the house. I only put a lightweight bird netting over the top for hawk protection. They were locked inside at night for predator safety. We have 2 pop doors on this - one from each side. You can see the deep litter in there.
I now have my flock using a pole barn with kennels I got on craigslist inside that I had set up for them one winter for more winter space. Never put them back in the small house but it can house a separate flock or meat birds, etc.