Lets talk Torque wrenchs

Looking for an affordable Torque wrench.

Working on a dana 60 that needs 250 ft-lbs

My torque wrench only goes to 150. Also want to be sure it does left hand threads as well because i ran into that once.

Whats your choices?
Pinion nut needs 250 I'm guessing ?
Hell I'm going to need to wear a backpack with 80 pounds & hang my Dana from the ceiling to help torque that.