I drive a converted Iveco Daily campervan. It has a bulk LPG tank, gas cooker and gas water heater, and electrical system installed by my non-qualified but competent self (perfectly legal). I am 27, 1yr no claims due to not holding my own insurance but 9 years incident free driving including driving for work.
My insurance cost £339 this year for SD&P, no commuting, 10k per annum. That was with Insurance Choice. Adrian Flux were roughly double that and they knew they couldn't match my renewal before they even punched in the details. There is also someone called Frank Pickles but I wasn't eligible as all drivers must be over 30.
Why a VW? You'll be paying through the nose for that, get a test drive in a Vauxhall Vivaro…you can get them as a crewcab, and are a pretty nice drive.