So you're writing your book and you've given yourself three months to do it in.
Sounds reasonable, right?
Because writing a book - telling a substantial story - takes a lot of time and crafting and work.
Then the editor will work on it, painstakingly checking it not only for language errors, but for storytelling errors.
Can you produce a book of, say, 65K words in the time frame suggested at the beginning of this thread?
A reputation is a difficult thing to rebuild, once lost.
There's a prevailing notion that writing books is kind of romantic,...
Well, if you want it to be any good, you need to disabuse yourself of that notion immediately. It takes work and it takes time - and much more of both than you could ever imagine.
The End