i have a 5055e no cab, no loaded tires, with the 553 loader, bucket weighing just under 400 lbs, woods RM90 on the back, full tank of fuel and my 220 lbs in the seat the tractor weighs 7920 (or maybe it was 7980), i do have the weigh carrier on the front i think it's about 120 lbs. i tow it on a 10K 20ft trailer. it is pushing the limits both in length and weight. i bought it because it was a good deal and would be useful. if i were to do it again i would go with a 14K 22ft equipment type trailer with stand up ramps
http://s938.photobucket.com/user/terryknight/media/tractor/0022_zpsda7f30bb.jpg.html i also have a 27ft GN which gets used as well
http://s938.photobucket.com/user/terryknight/media/truck/towing/008_zps320dc74d.jpg.html both have their place