If you can play poker and make it a good supplement to your day job, then I don't see why you should quit
but if playing poker for a living is something you really want to do, then I'd say go for it!
Of course 12 hours is a lot though, I don't see where you fit in all the poker. I'd change jobs if your job is not fun or challenging rather than to pursue poker, but that's personal preference. Remember to have fun in life and not to get obsessed by making as much money as possible.
$50 a day can be a very good living in his country BTW.