Welcome BumbleBee,
It is unwise to pay any more money in advance than you are prepared to walk away from. I suggest you pursue a "pay as you go" approach to training. You're not looking for credit from the company, they should not be looking for an investor...
If, later in your training, you're really happy with the company, certainly say so here, and you might consider paying some in advance based upon your personal confidence, if doing so offers you a saving.
If you are considering learning to fly, and building your experience for hundreds of hours and a year or so, consider buying a modest plane for your personal use, if you can meet the ownership requirements.