This would apply to investments which you are confident will yield a return. I used $50K in bank credit to fund my am campaigns when I didn't have that much in the bank at that time. There was risk but it was the right move. However, using credit to buy a luxury you can't afford is stupidity, don't rely on your current stream of income, especially in an industry as volatile as this.This is correct. Credit is there to use it. Use it.
You need hard, cold money to make money... don't give it to the banks all at once. Use their money instead.