Decent deal??

sure, but its tough,single truck you're better off running it yourself, No one will take care of your truck better than you LOL the old timers always said to run truck fleets in 3's to be profitable,1st 2 pay the bills the 3rd pays you the profit,
If you are buying from a dealer you can request a dyno test before you buy the truck, other things can go wrong but that motor is the big one.If the trans blows I can get reman for 2500-6000 installed here in San Diego, not to bad out of pocket. More than likely its a great truck, and like you said its only 25K and the time you spend with loved ones out there seeing this beautiful country and making money is well worth the price. Good luck!