A lot of the money is going to have to be spent in the first world ... first to get the technology down in cost but there are existing technologies that developing countries can use now and it should be in their budgets instead of paying for their oversized army or paying ghost salaries to government workers who are all relatives of the minister. I mean these countries will need to act with a discipline and honesty that they are unaccustomed to. We need to get their populations worked up to demand it. (I am from Zimbabwe which is why this bugs me)

To pretend that some people are going to entirely take care of others is demotivating and wrong. Most of us are going to have to take strain.

We are also going to have to de-emphasise NIMBY and other concerns that aren't absolutely critical that might block our investments in clean energy.

I think this is far more reasonable. Want to weigh less? Eat a bit less, move a bit more. OP said eliminate all carbon emissions. That's like starving to lose weight. A good compromise is "emit a little less, plant a few more trees" or something along those lines, which is basically what we're doing.

We already know it won't be enough to avoid consequences, as those are already manifesting, but it's the most realistic path forward by far.