I do not agree that shorting home builder stocks is a no brainer. It may work from here but here is the fly in the ointment. The valuations on these stocks are very low, and most have very low debt ratios as well. This makes them far from obvious short candidates.
What I want in a short candidate is high debt, poor earnings, and high price to sales ratios. These stocks have none of those 3 things. They may go down, and you may be right. However, my trading philisophy is to have as many things lined up supporting one direction as you can have. These stocks do not meet that criteria for me.
However, you made a great entry, so congrats! If this whole thing really unravels you will probably be proven right. In my trading I trade by systems, not opinions, so by the numbers, these do not cut it for me.