I used to have Ford Galaxy,2.0, which was surprisingly good on petrol,I only had the two front seats in it,andhad a wooden rack in the rear,which could hold 2 x 1/6th Tigers, and 1 x 1/6th Sdkfz 251 half track,
I now run a Ssangyong Musso,2.9d that runs on veggie oil,and it can hold model boats up to 9.6ft long,and its reasonably economical,35mpg for a 2 ton truck ain,t that bad,
Wullie