So apart from acceleration, gravitational fields, (an event horizon has both) and separate reference frames, yes I would agree with you : )
What are you trying to show though? That something in a steady state relative to yourself is in a steady state relative to yourself? That doesn't seem very interesting to me. It also doesn't prove any of Newtons laws either.
If you are in an accelerating reference frame, then Newton’s laws still apply because the sum of all forces still equals mass X acceleration, you just have extra forces (such as the coriolis and centrifugal forces in the earths rotationally accelerating frame).
Newton’s laws and Einstein’s predictions do not give the same result when gravitational fields are much larger than those on earth. Einstein’s theory of General Relativity is the most accurate gravitational theory we have because it works in all reference frames.
The steady state example actually illustrates Einstein’s idea in SR that the laws of physics are the same in all non-accelerating reference frames. It so happens that Newtonian mechanics is usually sufficient in these reference frames.