If your building on a sloping block this might be the sort of thing that your after.
http://www.wisteriahomes.com.au/index.php?option=com_k2&view=item&id=90:251-portland
its easy enough to change the front view to make it look like a…

There are a couple of types of chemical anchor available.
The traditional chemset used a glass tube that was smashed by the metal stud bolt.
There is also another chemical anchor that…

Cost will vary depending on style of construction and site conditions / site access.
anybody who is being honest should be able to work with you to achieve a suitable outcome.

The builder will be entitled to charge costs and margin on any work that they perform for you.
Some of the margin you mentioned may also include insurance and other government…