How often do you need to tighen your hitch ball?

In the 16 years I towed my TT the ball never came loose. You do need to use a large ratchet & breaker bar/torque wrench or wrench.

You can use a large pipe wrench on the base of the ball (will leave marks) and jam the nut with a large screwdriver or prybar. Works in an emergency but not the proper way to do it.

Instead of buying the tools, take it to a local auto, truck or RV repair shop and pay them to do it.