Bat Infestation Under Tile Roof- Roofing Miami, FL

I have seen a few bats in my roofing years but never anything like this!

The cheapest roof?

I'm pondering doing more research on this post from 2013. I originally started work on it in 2010. If anyone has ideas let me know. What I really want to do is get a chart and use a standard mid range value house. So the jury is still out, what is the cheapest roof?