For me I will be happy (atleast now i think so. a few years back my current earnings was what i thought i wud be happy with. so its all just a thought, a hope.) with $500 per day.
Well, I would invest half of it in various Mutual Funds and give the rest of it to my friend, Saheib, in Securities.
Well My first goal was $25 per day which I achived, but half way through last month I dropped right back to $6 a day - what a bastard!! Any how my main goal is $500 a day and have launched a few new site to assist in this as well as having a few I am finishing off.
The local red light district is the fast track for that...it's one of those male fantasies which (mostly) never eventuates.
I think that your "be happy" number will change as you hit your goals, I know that mine did. I hit my original "I'd be happy with..." # (from when I first started) a few months ago. Definitely not happy with it now, my expectations have risen, hehe.
I like to earn at least $10.00 per day. After some times it will increase to $20.00 per day and so on.