Too old to be FIRE. I'm a Late FIRE.

It took me awhile to get used to the idea we are wealthy but I now know we will never go broke. I will be 62 soon. Wife is 56. Three kids: ages 22, 19, 14. I don't have a financial advisor. I suppose I could have retired awhile ago but was always nervous. We have an annual burn rate of around $120k (excluding tuitions). I have $3.5 mil in taxable acct. $3.2 mil in 401k/ira, roth $160k. $900k 529s, $70k HSA, $250k in cash/gold/silver. $1.4 mil paid off house. Pension at age 65 lump sum $1.1mil or survivor annuity $7500/mo. I have currently been generating $8k/mo in interest/dividends.

So here's my grand plan. I'm going to start SS at age 62. I'm going to change my investments in the taxable acct to dramatically reduce the taxable dividends/interest. Im going to draw down the the 401k/ira and put in the Roth over the next few years. Im going to turn on the pension at age 65 as an annuity. All while being mindful of trying to keep below the ACA cliff until Medicare starts. Despite this, I know the rmds age 75 will be significant but I decided to not worry too much about it. Decent plan?