one more point:

6. Your lifestyle

If you like to work 9am-5pm monday to friday and also you like to lie to your boss by saying you are sick for one day stay at home, you probably should work full time for others and do your RE as 副業；If you like to stay at home with your blonde in the morning and have lunch with your wife at a restrant for 2 hours as jy did yesterday, you should take it or work towards it as 主業。