I've noticed most people that are under 30 are trying to coast through life and want to get paid for full-time work while only working part-time. People under 30 are opening up their own 'consulting' firms because they didn't want to be the fax/scanner bitch at their corporate office with what they perceive to be an over-qualified degree. These consulting firms led by people without a wrinkle on their face remind me of Homer Simpson who starts a website and asks everyone 'Can I have my money now?' A lot of other people I know are trying to make it big becoming 'photographers'. That seems to be the counter-culture career choice amongst the youth that should have full time jobs by now but they don't. I think these people just don't want to accept that maybe working full-time for a while is in their future.
Why am I saying this? Because I wanted to become a screenwriter too, but part of that perhaps was because I wanted to work part-time and get full-time pay. 100k a year for 1 screenplay? Possibly a million? Yes please! No different than musicians trying to make it big, actors who move to Los Angeles to try and make it big, etc. Here's a better tip, follow the money right now and save as much as you can. Once that happens start looking to transfer your career into your passions. I think I'll take up writing again when my future investments start picking up, when I can stop working 55 hours a week and instead 25. Get the money growing, reduce the hours of your old work, replace it with your passion and profit.