Sorry for asking so many questions! This is super informative. Thanks! :)
Separately, not to rain on your parade, but I'd really be worried that 4% might not be feasible based on current market conditions - that study was based on a period when the US was rising into the role of world superpower, and most of the industrialized world had just been decimated.
[0]: https://seekingalpha.com/article/4271159-corporations-bigges...
At the moment I just invest once a month combining last months savings with accrued dividends - which rebalances a little.
For example I have stopped reinvesting in Witan, Lowland and TR Property - in favor of smaller holdings - which at the moment looks like this.
BANKERS INV TRUST ORD GBP0.25
CQS NEW CITY HIGH ORD NPV
BT GROUP ORD GBP0.05
LAW DEBENTURE CORP ORD GBP0.05
JPMORGAN EMER MKTS ORD GBP0.25
POLAR CAP TECH TST GBP0.25
SCHRODER ORIENTAL ORD GBP0.01
CITY OF LONDON INV ORD GBP0.25
If I chose to live fully off investments in early retirement, my taxable income would be lower since than $40k since I would be spending some from after-tax accounts (which doesn't count as income). The lower income could mean higher subsidies, and lower health care costs.
I don’t see why you wouldn’t just keep working in a low stress easy job, part time or something, and continue to build savings.
Though I didn't specify the portfolio composition, most of my holding are US Large Cap, which are the 2nd best performing asset class below small cap: https://www.compoundvalue.com/wp-content/uploads/2013/10/IR_..., but both classes are significantly above the others (Bonds & T bills), so I'm not sure what's meant by low returns. If you mean sequence of returns risk, most people use a bond tent to mitigate the risk.
Like, if you've got $800k and can reliably earn 5%, as long as you're withdrawing only $40k you're good. But if you withdraw $41k one year, your principal is now only $799k. Next year if you need $42k, the return from your $799k is only $39,950, so your principal goes down to $796,950, etc.
From a quick spreadsheet, if inflation is 2% annually and you can get 5% on your principal, you deplete your $800k in ~32 years.
Doesn't seem too hard to fix with some supplemental income here and there?