i would stick to having seperate vehicles if i were you.
just buy a smaller cheaper van for work and stick with the car for the missus.
the problems going to be chopping and changing all your barrels/trolley etc/trad stuff constantly.and whatever you get its gonna get a bit wet and damp!!
keep the van for business and the family car for eh......well......the family....and family days out!!!!!
it would be a pain in the arse IMO!!!
REGARDS
DAZMOND