6% would be extremely aggressive, so I was thinking more like $4M at 3%. And you're right, I suppose a senior developer would be making ~$150k, so you'd need around $5-$6 million.
3-4% is the typical withdrawal rate that people use on the /r/financialindependence subreddit: https://www.reddit.com/r/financialindependence/wiki/faq#wiki...
My strategy would be to just put everything in a Vanguard Target Retirement Fund: https://investor.vanguard.com/mutual-funds/target-retirement...
It's cheaper and safer than a financial advisor, and you don't need to worry about rebalancing. I'd also throw a little bit of money into angel investing, but no more than 3%, and I'd expect to lose it all.
For hedging, I think once a year I would just buy some OTM puts for the S&P 500. A sane number might be something like 0.2% of your assets. If you're absolutely convinced that we're on the verge of a stock market crash, then you should still use 0.2%, because you're probably wrong.