I used a tandem axle 14,000 tilt deck to move a 8,000 forklift. Rated to 5000 lbs lift, triple stage mast.  Went all the way across Nebraska, thru weigh station with no problem. Put a 2 X 12 maybe 10 ft long under each rear wheel.  Talked to a trailer dealer here. Said most heavy trailers used to move skid steer would work with a little help to spread the load under the rear wheels.  What do you have for a trailer ?  Most places that rent trailers have more junk than anything.