Commuter vehicle – 170km per day – 3 children

Hello, an acquaintance is looking for a replacement for his current Golf IV with 400tkm. The car is actually only used as a commuter car. That means in the morning with 3 children (9-13 years) to school and then further 85km highway. So the car should be a 4-door. Currently an A3 1.6 TDI is in conversation for 15t€ from 2012, which I find a little expensive. The car has to be financed by the way, so he would like to buy the financing “more simple/uncomplicated” here. rk is clearly at a reasonable cost here, both in the purchase and in the maintenance. There are no special requirements, of course with such a route comfort would be nice. It should also become a diesel, whereby I personally would send LPG also into the race. How much you that? Which vehicles should be considered here? Greeting Joker