Telesphorus,
You mentioned studying music.  Are you currently employed or are you currently in school?  Just curious.  No need to answer if you choose not to.

Although I did say that I was curious, I would not label the question as idle curiosity as it does pertain to the topic that you have been discussing here.  

Your goal of having a large family is indeed an admirable Catholic goal and one that every young Catholic man should have who is seeking to pursue a marriage vocation.

Since it will take either a good income in our modern world to accomplish this goal or another means of supplementing a meager income (such as providing for a family by growing one's own food and/or building one's own house), I felt that the question did pertain to the conversation at hand.  

If you choose to not answer the question it is completely up to you, but perhaps someone here would be able to help you if you are in the process of changing careers.  In our current economy a change in careers is often a necessary and wise choice.