Load your trailer with with the heaviest load you will ever tow and go have it weighed. Follow the manufacturers towing weight recommendations and you will be fine. My Ranger is rated to tow 3900 pounds. My trailer with every piece of equipment I own weighs 3485 pounds (3500 pound axle). They key is balancing the trailer weight. I have brakes on my single axle trailer. I hardly ever load my walk behind and zero turn on the same day as this helps with gas mileage also.
Ford F350 & Ranger
Exmark Lazer AS 60" 28hp Kawasaki
John Deere GS30 bulletproof
Honda HRC 216
Shindaiwa T270, M231 Muliti-Tool & EB802 Stihl MS230 CBE [pos]