low maintenance costs, low consumption, max. 4000 EUR

Hi guys, at first I wanted to buy a small car and kept looking at the Twingo because I had set the budget at 2,000 EUR. However, for the money it will be really hard to get what ‘shit’ as I notice. Therefore I would like to use my budget of 4,000 EUR as follows, my requirements are the following: – no coupé or convertible, should definitely be 4/5 doors – I don’t care whether petrol or diesel, mainly city consumption is less than 8l and combo less than 7. I s However, it will probably be better to be a petrol engine, because I certainly do not drive more than 12,000km a year and mostly in the city or near surroundings. That probably speaks for a petrol engine, doesn’t it? I would like the torque of a diesel with turbo better. It should consume as little as possible, but still have a passageway, I should be able to drive on the highway at least 160km/h, and at 130 I should still be able to overtake – preferably no small car, so that 4 In any case, I should be able to accommodate two children on the back seat, and in the trunk a stroller + accessories without any problems. With a Twingo this will be a bit difficult, I thought about the size of a Seat Leon or Ford Focus? But can also be bigger, I have nothing against a limousine or a car. – he should definitely have ABS, el.FH, servo, ZV, airbags in front and if possible ESP. – it would be possible to store luggage. If he was not older than 10 years (from 2003) and had less than 100,000km on the hump. – green badge he should preferably have – as far as possible no expensive brands, so that the repair or service costs are not high. Is not in the budget anyway, but I exclude with it: Daimler, BMW, and also other ‘exotes’. Therefore, does not necessarily want a Saab. Which models could you recommend to me on the basis of these criteria? Would this focus be something for me or is that a no-go? With spritmonitor indicating an average consumption of 8.5l for this vehicle, and not as stated 5l (that would be too nice to be true). Look forward to your opinions and thank me very much in advance.