i am a fulltime institutional bond broker.
Trading is not all that difficult to do part time if you do it with a distinct trading plan, you program your trades, and you have a longer term time frame.
I have plenty of time for family, hobbies, and other businesses as well.
I only dedicate maybe 5 hours per week...and i am up about 30% YTD.
Dont make it more difficult than it is. dont worry as much about methodology, indicators, eps etc....worry more about how you treat your winners and losers...saves time.