When building, the windows can be an issue, especially if the HT is at the front. A few designs we are looking at have them at the front and the windows are huge. The front of the house would look really weird if you tried to put the smaller windows in!
The sound proofing pricing sounds ok to me, however i know next to nothing how much it should be. It is good to know that you can get it in the quote from the builder as well, so that can stay away from my HT budget (the only WAF i have!).
My wife and I are considering custom also, that way i will be able to put the HT as the second room from the front, with a small study in front of it. That way we may be able to get away with a small window on the side, or even get away with no windows. But I am not sure if this is allowed.
Im curious to see if the footy was using HD or SD? If free to air footy then I actually am not sure if they have footy in HD.
I am aiming for a 130 inch screen