The sooner you get your licenses and ratings the sooner you can start getting paid to fly. Instead of getting 100-250 hrs a year learning you'll suddenly be logging 500-1000 hrs a year. Spend the money to ACCELERATE your career. If you spend $50,000 in one year it might gain you an additional year at the end of your career. That's worth $200,000 to $400,000 as well as more money every year when you're at a major airline since you might be hired several months, or years, sooner.
Sometimes debt makes sense.