( 8 ft ceiling, length 312" width 165') painting of ceiling, walls, and one side of 3 doors and a one side of a 6ft bi-fold door. Two coats on walls and ceiling. No trim, and a stair well.

I can't make head or tail of your question... and there isn't even the price of painting a certain area with a coating.

gdisantis does not find this helpful : the question was not answered.

But how can I answer such a question if not enough details is given.

If I could very well tell you it costs nothing or could tell you it costs a million to paint that room, it would be correct since you didn't mention the price of the painting a particular area. Well, if you think that you'll get the answer that you are looking for by asking questions like that, you'll have to see psychics.