If your bike has enough torque to safely tow a trailer, the second thing is to make sure your trailer isn’t too heavy enough. After all, for cheap roadside assistance, it’s not just about power when a blow of wind pushes you from the side. On a bike that’s too small.
If you add up yours, your gear, and your motorcycle weight, take 20% weight of that total. You now have the total weight of the exact heaviest trailer that you could safely pull. Preferably, your trailer would weigh less.