OK so let put out the numbers here.
You have to finance before you start 15000 for TR + 5000 line training a total of 20 000 Euros.
You are bonded for 3 Years and the rest of the TR cost (15000) will be deducted from your salary during that time.
If I am correct it seemes like a pritty good deal, BUT I do not know what the salary is dough.