As a couple others have said, concentrate on aviation. Don't go into instructing with the intent of getting hours and moving on. Go into it with the desire to learn and be the best. The instructors that don't make money are the ones who ***** themselves out just to get the hours and move on. Sure you want the hours, but become a knowledgeable, respected instructor while you're at it. If you don't get a job at a pilot mill you may be able to pull in a respectable wage. I was able to make 35-45k per year as an instructor which actually allowed me to save up for the lean years when I got my "real" flying job. And, I got a lot more from instruction than just hours in my logbook.
Just something to consider. Everyone's experience is different.