Second for family

Hello, I know the topic has been touched on many times and often discussed, but somehow I will not really find it. The following situation: We are a family father, mother and another child (the second one is planned and should be there in the next 2 years at the latest, if you can plan it that way. Ok at the moment we drive a Mondeo Kombi MK3 year 2006 with just under 100,000 km on the clock and a Golf 5 3 doorr also year 2006 and Knappen 170,000 km on the clock. We want now f for the woman to buy a compact car that has 5 doors and a bit of trunk for the purchase. Big purchase is then made with the Mondeo that I can drive then. 🙂 Do you have an idea? Budget. Golf should be sold (perhaps 4000-5000 Euro) rumdum should not cost the “new” car more than 7000 Euro? I am not so tied to the brand, but should be reliable and inexpensive in maintenance?! I am happy about opinions, suggestions etc from you. Thank you