For what it is worth, if you want your withdrawals to last for decades, then you are limited to around a yearly inflation-adjusted cap of around 3% of the original principal per year, gross of taxes, if you invest in low-cost passive index funds. That is a budget of $30K/year for every million you have invested in the market.

If you are interested, the /r/fire and /r/financialindependence subreddits are useful.