I am planning to have a 3D animation short movies, My question:
Is it considered off-topic to offer some paid work related to Blender, in blender stack exchange?
"Legal" yes, I guess so, but it is off topic and would get closed.
Job offers are off topic. We get maybe one a month or so, and they quickly get closed, and directed to blender artists' job section.
So to save you from quickly getting your "question" really a job offer DVed and closed, just post on BA, its linked above.