Based on the comment about the power required by the power
ventilation, I'm abandoning all thoughts of that. However, the HVAC
guy also said that the standard for insulation was R19 but not it's
R38. I need more insulation!

While I was installing the soffit vents, my thermometer next to me was
reading 108! I looked online and the heat index was 119. Guess
that's why the AC is struggling. :-)