advice requested

My nephew is tractor shopping and found this on Craig's List. Opinions please, I'll pass them along next week. He has the trailer to haul it home, approx. 350 miles. https://chicago.craigslist.org/wcl/hvo/d/dundee-2018-kubota-m6-101/7836461009.html

Those of you who have them, what do you recommend? Size? Power? Brand/model? Anything to look for / watch out for? I've used them a lot for work, but never owned myself, but any use tips or tricks are welcome as well. Thanks for any tips! All the best, Peter