This balloon payment calculator will show you the impact of this option when purchasing a car on finance.
When I bought my first car on finance with Wesbank, I knew taking a balloon payment will affect my finances negatively in the name of having affordable monthly installments.
To me, it didn't make sense other than if I took a balloon payment, it definitely meant I couldn't afford the car I wanted to buy.
I obviously don't mean to discourage you with my experience but see it this way, you took a balloon payment for a smaller monthly installment however still need to save extra money to pay later as a lump sum to settle the car finance credit.
Don't take my word for it, simply use this calculator, see the numbers yourself and make a suitable decision.