I agree that a 3200 lb tractor only can be easily handled by a 16 ft 7000 lb trailer but after you add the front end loader approx 1000 lbs and the back hoe approx 1200 lbs you are getting close to 5500 lbs if you don't load the tires. Add the trailer weight of 2000 to 2500 pounds and you could be overloaded on a 7,000 trailer. You would be wise IMHO to go the extra margin to 10,000 lb gvwr trailer. Also the tractor is just over 10 ft long, add 3+ feet for the FEL and 4 to 5 ft for the BH strapped down on the deck while travelling and you will be hanging over a 16 ft trailer. My recomendation is an 18 ft trailer in order to have adequate room to obtain proper hitch ballance on the tongue of 10 to 15% of the total weight including trailer and a safer option especially if you wanted to carry anything else. The OPs 5.2 foot wide tactor will fit easily between the fenders of a regular equipment type trailer which is lower to the ground and a little less expensive than going deckover model which usually requires a beaver tail or very long ramps due to the extra height. Unless you are planning to go 5th wheel hookup, get a load equalizer hitch, it makes towing a regular trailer smoother and safer with loads over 6000 lbs. I don't profess to be an expert, but I regularly tow a 30 ft, 12,000 lb travel trailer from Canada to California as a Snowbird and I can handle over 100 bales of hay or my 7,000 lb tractor on my 18 ft 10,000 lb trailer without ever being concerned about a margin of safety. These are just my opinions and one of the advantages of OTT is that you will get lots of varying views and everyone is trying to give their ideas to hopefully help you make the choice that is best fit for your circumstances. Good luck with your choice.