WBX motors are crap end off. there very good at drinking fuel and leacking water, thats about it
1.6 TD t25's are slower than a retarded snail
T4 is probaly a more econmical choice of van, tho if it's just a band hack highly recomended are LDV things i think they called them a convoy
they are nasty, nasty to drive, slow and bits regualy drop off. but they use naff all fuel, about a cheep to insure as your ever going to get. and you can buy ones in good in good condition with resonably low miles for literaly what they would weigh in for if you look in the right place. one or two outings a week should be managable in it