Hi , "Davant" Freelancing is a challenging job although I am a new comer on this section but I would like to give you my though. For time maintaining you should follow a routine work and it should be at night because in this time you are able to give highest concentration in your work which not possible in day. But don't pick extra tress you have to work 5 hour a day. ( I think it’s perfect ) . As a freelance web designer you have to keep yourself update always so you must have to a study time every day. I believe 1 hour per day is perfect for this. Thanks