You'll need a lot of car to transport your large family and all their luggage, but that doesn't mean you need to spend a lot of money finding the perfect transport.
1 - Toyota Previa (1992-2002)
Toyota’s people-carrier was never exactly lovely to look at, especially when new in the early 1990s, but it has plenty of other virtues. Space is one and extreme durability is another. No other car in the patch copes so well with high mileages and just keeps working. Better still, Previas are eight-seaters, so you can take granny wherever you and the family want to go.
For Spacious, reliable, economical and plenty of torque
Against Ugly and the interior trim collapses eventually
2 - Vauxhall Zafira (1999-2007)
The Zafira, related to the Astra saloon family, is better to drive and more compact than many seven-seaters, because Vauxhall has always been good at designing space-saving retraction systems for the rear row.
There are many hundreds for sale, so decent ones will be available near you. Diesels are probably the best bet for economy and long life.
For Good space for its compact size
Against You won’t stand out in a crowd
3 - Land Rover Discovery 2 (1992-2002)
It’s mainly an off-roader, of course, but many are available with seven viable seats and the sixth and seventh perches face forward, rather than sideways as in the original Disco model. Weirdly, it’s second-row passengers who are rather cramped for space, but the view from every seat is panoramic.