Heck, I put my BX 25 on a 5 x 10 trailer, and I upgraded the axle to 3500 pound axle, with electric brakes. The front end loader stuck out over the the front and was held down just behind the front jack, while the backhoe stuck out over the back. Only used it in emergencies, maybe two or three times. Then I got a great deal on a 7000 pound flat deck trailer with a beavertail and lovely ramps. It was an 18 footer, so now I have lots of room for everything. And, with brakes on both axles, it is a lot safer, too.
Even so, if I really had to, I could always take the front end loader off and the backhoe off and put the tractor in the old 5 x 10 if, for example, I wanted to take it in for some service on the main part of the tractor. The tractor itself only weighs about 1500 pounds, so the 5 X 10 would be more than adequate.