Buying advice Omega

Hello guys, I would like to ask you a question. I run a sailing school in Bavaria (that’s why mine is also the segelomi) and need a station wagon. You have so many things to take with you to the lake. Also, the omi needs an AHK because it sometimes serves as a drawhorse. However, the trailer load keeps in limits, so around the 400 unbraked and 750 braked. Now my question: is it enough for the “small” diesel, or should I rather go back to “V6”? enziner. Where is the diesel in “actual” consumption and where the petroler, also than 2.2 L ?? Are there alternatives ?? I drive about 35,000 km a year, mostly in 5 to 20 km mode. Ask for as much information as possible. I think mine doesn’t make it that long. The friendly has murmured quite a bit during the last reperatures. Greetings from Franken