You know you're asking a tough question, but I understand wanting to get a sense of comparison. So, here's my info. I am 42 and finally FIRE'd this year, although I will be teaching college part-time for the forseeable future, earning around 10-20k per year. My current taxable portfolio is around $2,050,000 and I live off that with 5k per month, which is a bit over 3% WR. This has been more than enough (seriously, MORE than enough) but keep in mind the following:
- I have a partner still working whose take-home pay is about equal to my monthly minvestment return
- We have no debt
- We have no kids
- Partner will have full pension and health insurance for life when he retires end of 2014 (I will use Obamacare when my COBRA runs out in early 2014)
- We own a house worth $1,000,000+ which has no mortgage, and at some point we will likely sell it and downsize; currently pay property taxes of about $15,000 per year - ouch
- We live just outside New York City, so very expensive
So, now you have my information as a point of comparison, but as you can see the variables are huge. I am extremely fortunate and have a lot of cushions in various forms. But given my experience, and assuming you don't live in New York, I would say that $2 million would be MORE than enough for you too.