Very interesting thread. I've been looking into this in depth recently, as we're needing to get a large vehicle soon, after our old estate died at the end of last year. There are only three of us, but we seem to have a lot of scenarios where having a huge amount of space is very useful. If we went down the van route, it would be one with windows and extra (removable) seats, so technically a van-based MPV.
A massive consideration for us is being able to tow our (medium-sized) caravan. I haven't really found much in our price range that has much more than 100BHP, though, so I'm not convinced it would lead to a smooth towing experience. As it stands, we're looking at a Sharan/Alhambra as our best option. The high driving position is much better for my mobility issues. We're not really interested in 4X4s, as they seem so expensive at every stage and aren't actually that big inside, as they're packed with armour!
Does anybody on here use a van to tow a caravan? Do you find it quite sluggish (albeit doubtless solid and secure) or am I mistaken in my thinking there?
Re the driving licence issue, you can drive a packed Luton van on a standard car licence - if you passed before 1997, you could also tow a trailer with another Luton behind it! You'd be getting into serious 'unquestionably commercial' territory before you'd need a special licence to drive it - far, far over and above what anybody would ever consider getting as their everyday family car.