Cluless -- but would lie a rock garden

I am interested in a rock garden but am basically completely clueless as to what is involved. I live in New York State, Westchester county. I think I am in an unusual position in that I have the rock, lots of it! The bit of garden I am trying to rock garden on is about the lenght and size of 4 minivan's parked end to end (Honda Odessy size).
I ended up with this big chunk of rock after blasting to build my house. On one side is rock bits and dust which I am slowly removing and cleaning up (heavy going). On top is a mat of top soil from then the rock was part of a wood. And down the other side is a steep slopped drop of about 40 feet.
My questions are:
1) Are rock gardens high maintenance? Is there such a thing as a low- maintenance rock garden? 2) What sort of watering needs can I expect given my location? 3) How much top soil do I need for plants? I am trying to decide if in some areas if I want to remove top soil and rock bits which is about 1-2 inches and reach bare rock. Or should I add more top soil and make it a place to plant plants. Do I need lots of top soil to get past winter freezes, or else my plants will die? 4) My garden is like deer resturant central. Is a rock garden a non- starter because the deer will eat it? They seem to eat everything. I am in a high deer population zone.
Thanks for any comments / suggestions.
Warmest regards, Mike.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.