Purchase advice Subaru Outback 2.5

Hello dear Foris, I am looking for a new used one and need your help for this. Briefly to the dates: I drive about 20000km a year from time to time with horse hangers (to 99% only with a horse) every day over wet, muddy couplings have dog & saddle what should be stored in the trunk the vehicle would like to drive the next 5-6 years Budget: approx.800€ – 900€ my choice a lot on the Subaru Outback Kombi 2.5 Gasoline with manual transmission Hope already you don’t guess me g anz from Now the question is whether I should take an older one with a little km or a newer one with more km? I looked once, you get for the price which so around the 100,000km from BJ 2005. Or then hold which one from year 2007/2008 with approx. 180,000km. Supposedly the cars should easily rewind 300,000km. But is that also true? Which would you recommend? Or rather an automatic because of the trailer? What weaknesses do I have to pay attention to? What about the clutch? Does it only cause problems with the diesel engine? I’m spoiled at the moment, my Opel has still driven the first clutch with 16 years & 220,000km despite regular suspensions. And besides wear parts has never broken anything bigger. Is the outback also so reliable? I look forward to your answers. Thank you in advance.