#1, get an auxiliary transmission cooler before you do anything else. As for the rest follow the advice here. We pulled a 17ft hybrid with a Pontiac Montana for one season. I knew what I was getting into, lots of reading and research. It actually worked just fine. But I was just below all the capacity ratings. I was stable and felt safe. We did not kill the van. But the towing experience was not stellar either. We only had one kid, who was a teenager at the time. So set it up right and you'll be fine.
That said if you buy this trailer you'll love it. And I predict a new tow vehicle in your future.