Booms Sounds is correct, Trailer lighting is tricky but not insurmountable.
Your biggest headache will be braking. Nearly all AS trailers (and other US Caravans) are electric brakes. - No problem there, but you need to install a brake actuator in the tow vehicle (Buy in the States). - It is hard wired to the trailer via the umbilical. In the past we have changed the wiring to the 13 pin cable to accept this and the other charging/fridge requirements.
The other headache? In most cases the chassis does not have corner steadies or parking brake. I have a contact in the US who fits the EU chassis - I could do it here but at present snowed under with work.
Don't forget, you cannot ship the gas bottles with it - any way the 6Kg over here is readily available - keep the regulator.
Any queries call/PM me or Boom Sounds
Don't take life so seriously.... it is not permanent!