zafira on pic looks nice - new galaxy is nice to tho!
be a shame to buy that and start throwing work crap in it tho - i think most of us treat our work van alot different to the family car.
one thing to maybe think about - alot of guys will go into wfp with a backpack or trolley and then realise a van mount is a must for them after only a few months - so would you put a tank in the zafira?
i started out with a van system after a year or so i got fed up reeling hose in an out moving the van so many times a day it was a wind up so i brought the freedom trolley i use 1.5mm jets in brush a shortened slx and it works better for me, i think it depends on how your round is laid out, i got a little 70 ltr tank and drums so some times i leave trolley in motor attached to 50m of pole tubing and remote for of an on, really my round suits the trolley better but a combo system of both is the way forward, i also carry a backpack for those odd jobs when you got to walk through the house to get to the back as there is no access,
i would say for new comers a trolley is a good way to start and can be adapted to a van system and grow as you do, but cant rule out the backpack its a handy item.