Post Closing Lender Audit?

[Pete Hathaway]

I'm currently buying multi-family properties with the goal of leaving my 9-5 office job.  Should I be concerned about the lender doing a post-closing audit and accelerating the loan once they discover that I've left my secure IT desk job (which was my only source of income and the cornerstone of my mortgage application when I started buying)?  Has anyone been in this situation?  What are the chances of a post-closing audit from the lender 3 months after closing? 6 months?  A year?