[Theunz]

Absolutely loose lug nuts. Professionally installed is a joke, they use an impact wrench that more often than not will over torque the lug nuts and stretch the threads causing them to not hold as well!
Find out what the torque is on your truck and buy a torque wrench that exceeds both the truck and the trailer. I recommend one that goes to 250 ft. lbs. it will be longer and give you more leverage which you need for higher torque numbers. Also torque wrenches are most accurate in the middle 80% of their range.