How long to prep for NCLEX if working full time

Hello All! This is going to be my 3td attempt in taking NCLEX RN. I am now working full time as an ER Technician. My last attempt was October of last year. I only used NCSBN learning ext but only did the questions.

After I finding out the result that I failed, I started on reading Saunders Q&A on Kindle while at work and at home. I am on 1,000th plus question already.

I just finished Lacharity Book from cover to cover.

And right now, I am waiting for my ATT so I can schedule my test.

How long do you guys think I need to prep for my next NCLEX. I know it really depends on my own pacing.

I can NOT afford any of the Kaplan Online programs. So I am thinking of going NCSBN learning ext again or Kaplan Strategies Book would help me more?