Its a tricky question as a new boat is not going to be like a new Ford Focus, it will not be identical to all the others, it'll be a bit longer/shorter, have windows in different places, Isuzu /Beta / Nanni etc, PRM gearbox or something else and many differences in wiring/lighting/heating from all the others that look identical bur aren't, that means that the fitters have had to use skills or ingenuity to successfully put the whole lot together, Think TVR instead of Ford. Some of that will result in difficulties later on (and as for plumbing....) The shell and steelwork should be completely trouble free but I wouldn't be surprised to find a few problems with the rest, boats are complex. As for a surveyor, personally I would not bother, there is a good chance that he/she will not spot all the problems, they have not got x ray vision. Life, cars, boats, people, none of it perfect