Well it'll be a D40,
So cheapest would be get longer shackels (rear) and coil spacers (front) made up.
Old Man Emu suspension lift from TBR seems to be fairly good.
Or get something from the states as they have setups for big lifts 6" or so.
There are vairious body lift kits about.
As I have a D22 (2002) I am not sure of tyre sizes, but a lot of guys put on 265/75/17 BFG's without any mods.