You don't pay taxes on future income once you renounce your US citizenship anymore.
It used to be like that but it hasn't been for some time. There is now an "exit tax" that treats any assets as being sold on the day you renounce your citizenship and you would pay capital gains, etc. taxes on those.
Once you do that you're free forever, and for most people this would be nothing more than just paying some normal capital gains taxes if they sell their house for more than they bought it for.
Sounds too good to be true. Not doubting you or your research.
Good luck bros....