Its a long drive there for you but if a job is worth doing its worth doing right, carl is spot on and has done so many of these chains now, he could probably do 1 with 1 hand and 1 eye closed.
specialist work so I would make sure who ever does the work that they know exactly what there doing. A cam belt and these chains are totally different. Iv done loads of cambelts but I wouldnt do the chains on a z22se/z22yh or similar.