As far as getting by while trading, my advice is to look into the following options (options meaning choices, not financial instruments

) if you want to day trade:
1. Move to an area where you can hold down a full time 9-5 job AND trade either US or European markets (Asian markets usually suck unless there's a crisis going on). This will be difficult as you'll probably burn out from both your work at 8 hrs a day and trading 6 1/2 hrs a day.
2. Find a job that will let you trade JUST the first two hours of the day, where most of the volatility is. You'll probably have to develop strategies to trade multiple instruments, e.g. stocks or different futures contracts and currencies. All you need is to catch one good move a day, and once you develop enough setups that is doable.
3. Move in with the parents and take good care of them. Probably the best option if it's available to you. If your parents are good people they'll be happy to help you and build a tighter relationship with you, and when they're gone you will be happy you spent more quality time with them. Yes, some people will say things behind your back ("he moved in with his parents to gamble in the stock market") but good entrepreneurs could care less about what other people think. Spouses can be more complicated, but it can work too.
4. Start a business that you can do outside of market hours and preferrably remotely. Figure it'll take you six months to come up with a good idea and research it, then a year and a half to get it off the ground and win enough clients, which you can do while working somewhere else and still having a little time to look at some charts. Then transition to the business, cut the day job, and then build your trading business. It's not the smoothest situation, and it requires a lot of dedication and patience, but it will offer you good flexibility.
One of the biggest things I've discovered in my journey is that a lot of the work is done OUTSIDE of market hours. Sitting behind the screen is all about executing a plan that has been hashed out very carefully through research. It's sort of like making a movie - most of the time is spent developing the project, the filming is usually the easier part. That by far doesn't mean that filming or trading is a trivial matter, but a movie with a bad script is as much a waste of money and time as a trader with a bad plan. The other good news is learning and researching is the cheapest part, just as writing a script is. Everything you need to know can be found for free over the internet, you just need to get your hands on some market data (broker provides it if you sign up) and you can get started.
Unfortunately this goes against what most people want to do right away, and I say this from firsthand experience. People just want to get down with it because they feel they're 'doing something'. The problem is that in the time it takes for you to experience one day's price action you could have studied at least 3 months' worth of charts. Most people don't get that and say 'I just need screen time'.
Anyway, some food for thought. Good luck!