The trailer hookup wouldn't be sufficient to handle that amp draw.
You can add a PTO to most trucks, super easy if the platform is also used for tow trucks.
I am concerned about the amperage draw on wires from the battery with that length of run, I guess an auxiliary battery in parallel could mitigate the risks.
A PTO is still totally doable, the braketry is a bit of a bother, but you are making a tow hitch mine flail so finding a longer belt and laser cutting some metal is not undermountable.