Don't feel bad, I like helping people. Others have helped me on here, now I'm paying it forward. Ask away!
If all goes well, deep bedding should be dry, so the risk of damage to the floor is low. However, I like playing it safe, so I gave my floor protection just in case. I painted it like I painted the walls and everything else, with a waterproofing stain, and, in addition to that, I covered it with oilcloth. And by oilcloth I mean the modern-day synthetic equivalent to what was once oilcloth - so, no oil or cloth on it really, it's just a plastic-like synthetic material, but it's thick and durable, and cheap. Cheaper than linoleum, but it does the job well enough. I bought it on Amazon, sold by the yard. Probably not necessary for my purposes, but just in case. You can see pictures of it on my coop page.
I'd say about a foot off the floor. Will measure tomorrow when I measure the roosts. Don't forget to put the pop door and the human door some distance off the floor as well, so your bedding doesn't spill out when they're open.