Okay, good answers!
How about the question of a sabbatical vs. FIRE? There is no need to burn bridges, if your good boss is flexible. You could certainly take some time off, and learn from experience if that's really what you want. Thinking of this as an all-or-nothing, permanent decision just adds to the pressure on you. But, in reality it is not. If anything, financial independence gives you the opportunity to change your mind.
Looking at healthcare; I see you have $200 a month penciled in for ACA. Good, in that it's more than zero! It might be a lot more than you will really need, though. Taxes, too, for that matter. I assume you are going to live on your taxable account, at least for a while, since it is a good amount of your stache. First bit of good news: welcome to the 0% bracket! As a single person, up to $47k of long-term capital gains is taxed at 0%. I have been here for 4 years, and it's quite an interesting spot to be.
Looking at the ACA, though: do you have an idea what the appreciation is on your taxable account? It can have a big impact on your taxes and ACA status--even mess it up!
For example: Say your investments have appreciated 100%. If they are in an index fund, that would take, on overage, 7 years--so, they are long term! (I.e. over 1 year) You take out your $36k for your budget. What's your income? $18k! This actually puts you close to poverty level income for a single. Many people do that purposefully, for a variety of reasons. But you do have to watch what's going on, because if you unintentially go too low, you end up force to Medicaid. (Or, you could intentionally go lower--cash out the same amount, with assets with more percentage appreciation) and go to Medicaid intentionally.
This is a lot different math than IRA withdrawals, where every dollar withdrawn is an ordinary income dollar.
It can be fun, but it's also a kind of bizarro world. I end up doing Roth conversions each year, to make sure I don't let any non-refundable credits slide. (We are a family of 3) You could play a similar game with the standard deduction, to at least do some conversion with no taxes owed.