We need 2-6% of GDP each year spend on this. For the next 30 years.
This is an amount of money we could just create by monetary policy or Quantitative Easing as the like to say. Nobody needs to get poor when money is spend.
Getting to netzero is most economically achieved using solar, wind and battery storage + gas peaker plants for intermittent capacity needs (already today and more so in the future).