お空の読み方
「おそら」と「おぞら」は、どちらが「お空」の読み方？どちらもがいいですか？ならば、違いはありますか？そして、「空」だけはいいんじゃないですか？「金」だけは、たしかちょっと失礼です。
文法の間違いと不自然なところを直してください。

How is お空 read, おそら or おぞら? Are both options ok? If so, is there a difference between them? And　just 空 (without the お) is ok, isn't it? If I recall correctly, just 金 is a bit rude (mafia-like).
Please correct both grammar mistakes and also anything unnatural.

Question

お空の読み方
「おそら」と「おぞら」は、どちらが「お空」の読み方？どちらもがいいですか？ならば、違いはありますか？そして、「空」だけはいいんじゃないですか？「金」だけは、たしかちょっと失礼です。
文法の間違いと不自然なところを直してください。

How is お空 read, おそら or おぞら? Are both options ok? If so, is there a difference between them? And　just 空 (without the お) is ok, isn't it? If I recall correctly, just 金 is a bit rude (mafia-like).
Please correct both grammar mistakes and also anything unnatural.

Answer

- How is お空 read, おそら or おぞら? 
  [Answer] おそら is correct. おぞら is wrong. 
                   By the way, if you want to express 大空, you can read おおぞら. It means spacious skies.

- Are both options ok? If so, is there a difference between them?
  [Answer] No, the reason is  as mentioned above.

- just 空 (without the お) is ok, isn't it? If I recall correctly, just 金 is a bit rude (mafia-like).
  [Answer] Yes, it is OK. お空 is more polite than 空. But this case, just 空 is not rude. 
                   When adults talk to kids, they tend to use お空. And when adults talk to other adults, they tend to use 空.
                   However, お金 is used by everyone except for people who have a sharp tongue.(mafia-like)

Hi, Aécio! I hope my answer will be helpful for you. Thank you for reading this to the end!