Once you upgrade...another 5 minutes of two-engine taxi or 10 minutes of early APU start on every flight for the remainder of your career should put a dent in their $4000.
You might not have the money...but neither will they.
Drank,
I know/think/hope/pray you have a greater amount of integrity than what you just posted. I assume you've been drinking some mixed-$h1t (Johnnie Walker) instead of the REAL Single Malt juice like Macallan.
If you haven't already, try the "Godfather" cocktail.
GJ