What do you plan on towing the trailer with? I routinely use my 16' tripple axle dovetail to tow my 580K around but I use a 2 1/2 dump. The backhoe just barely fits so it doesn't allow for any front to back movement to adjust tongue weight, something you may need to do with a smaller tow vehicle. One nice thing about the backhoe is you can let it over hang while keeping the bucket on the back of the trailer. So in the case of a BH that last two feet, the dovetail, can be used turning your 16+2 into an 18.
If you have a QA fel you may be able to get away with a smaller trailer by putting the front bucket in the bed of a pickup (assuming you're towing with one) to give you a little less length. Is it possible for your dealer to allow you to load your m59 onto it? Maybe have him drive it to your house?