Hello. How are you doing? I'll be happy to assist you.
I'm looking at your pictures
How thick is the slab and is it reinforced?
I would not let an 8" wall cantilever up off a 4" slab.
That is a cantilevered wall. It's a vertical cantilever off the 4" slab.
Concrete is poured against earth all the time. It just requires additional clear cover for the rebar
It's the way it resists loads (as a cantilever) that makes it a cantilever, not a tapered profile. I would build it as a cantilever, but with a properly sized footing that is independent of the court
Because it only has a thickness of 4". The moment capacity of the slab is not even close to the moment capacity of the wall, so it doesn't even make qualitative sense. It's supporting a bending moment, not just the vertical load.
Hello, do you have any other questions for me on this topic? If you could rate my answer, I would appreciate it.