Answer 1:it all depends and it's very complicated, though not hard. See the investor alley threads.
Answer 2: in the usa, you need a stash ( net worth, moderate liquidity) of
Ultra-Mustashian lifestyles, living costs 25-35 k/yr,
-$600, 000
Normal Mustashian life skills, living costs 35-45k/yr
-$1, 000, 000
Partial mustashian life skills, living costs 45-60/ yr
- $1, 500, 000
Face punch-city, you really need more than that?
-$2, 000, 000 to infinity