I once did a fixed bid contract that was sized by someone else at $150K. I completed the bulk of the work over three days. I spent about 40 hours on it total i

I once did a fixed bid contract that was sized by someone else at $150K. I completed the bulk of the work over three days. I spent about 40 hours on it total including the production roll out. I most likely could not pull that off again because I had very specific domain knowledge. I knew the software I was modifying and I knew exactly what to do over all of the various systems.