Lots to be thinking about here.
Van based car? or MPV? diesel or petrol? I'm not too worried about resale values as I imagine I'll drive it to death.
Insurance is important I'm a relatively new driver; passed my test three years ago so I think keep HP and CC down, also no desire to go fast.
Citroen Picasso C3 and the other Ciitroen MPV looks a good buy but has it got hydraulic suspension that always seems like something that can go badly wrong with no warning.
VW's seem to bit over budget
Nissan do a small van, the NV200. Also available as a mumbus. Quite narrow but look to be roomy for their size. They replaced it with the NV250, their badge engineered version of the Kangoo.