First off, if you're contemplating changing careers because your wife isn't happy w/ 160K / year, tell the cunt to get her own fucking job and make her own fucking money.
Now, if you can find a job working for a hedge fund or whatever to do the trading for, then by all means, go for it.
If you're thinking of just day trading your own account, forget it. You won't make anywhere close to 160K / year (if you make any money at all), at least in the beginning.
If you want to trade, do it while you're at work first. See how you do before even thinking about doing it full time.