the switch from brokerage to IRA withdrawal via ESPP

It had to come sooner or later. I decided at retirement to withdraw exclusively from the after tax brokerage account. The $415k there lasted eight years despite covering all cost of living expenses, including an additional $370k in payments to buy out the parents farm. Now it's basically gone. I will be moving to my traditional IRA by getting ESPP under rule 72(t). My yearly withdrawal will be based on my life expectancy as of my birthday this year (47, so 39.0), any balance at the end of a day this year ($1217944.91), and 120% mid-term rate of either Feb or Mar (5.43% in Feb). So I will have to withdraw exactly $75770.00 every year for 14 years without deviation to avoid the 10% penalty (rounded to nearest dollar, which is considered de minimis). That will be a total withdrawal of $954,706 after 10% income tax withholding. In addition to the $954,706, I had $29,723 as a starting balance this year, a total of $45,651 in Roth conversions that will become available over the next few years, and an assumed/estimated $21,000 in interest earned on the cash in Vanguard's cash plus account for a grand total of $1,051,080. My initial year budget will be calculated based on the assumption that spending will increase by the average CPI of 3.4%. Thus the first year spend budget works out to $59,459. I will round to $60k/yr and $5k/mo to keep it simple. That amount will increase 3.4% each year over the previous amount. This number also happens to be what I was already spending yearly -- as well as what a 2% spend would be based on the combined values of my retirement accounts ($1.3M) and farm value ($1.7M). If additional funding is needed, it will likely come from my Roth IRA, wife's IRA, or HELOC. Wish me luck.