OK, so this was the journey (spread over 6 months so didn't have the outlay all in one go but neither did I need PSP...
Start with an 11 month old 7000 mile Highlight Kombi 150 (2+1 front seats was the one I wanted). All the driving luxuries (aircon, parking sensors, cruise control) plus proper VW sliding windows (I hate the aftermarket ones with recessed glass - just my OCD) and of course, the sliding door on the correct side for the UK. Cost £27k from a VW dealer with full service and warrantee. Put the back seats on Gumtree, £750 back 2 days later.
Add: A quality pop top roof with solar panel (Skyline in my case), full sound and thermal insulation, Eberspacher diesel heater, leather 3 seater (crash tested) RIB rear bed (2 seater also available), full furniture pack (in any colour you want - or wood effect), sink, 2 burner hob, underslung LPG gas (why would you want a gas bottle inside?!), water, 240V and 12V electrics, fridge, satnav + reversing camera, day time / night time dimmable interior spot lights and Bilstein adjustable suspension (optional!). Total (inc the van) = £40k. No problems with insurance, VW warrantee still intact and I'm pretty confident it will hold it's value.
Don't get me wrong, I love the Cali (apart from the door being on the wrong side
), but I needed more than 4 seats for an every day van/car which could house the family. I must admit, I'm pretty chuffed with the value though.