Been through the N, NA, and NPT stamp process 3 times now, and once for NV. I've helped/prepared N1, N3, N5, FSAR's etc. I've been on the owner side, and construction side of the fence in various aspects. There are reasons 'free' material is scarce. First and foremost among them being the requirement to maintain your own program. Getting your NQAM together is no easy task and usually requires reinvention of the wheel as ASME takes a dim view of copyright issues. Then there are the regulator requirements that must be folded into your program. Just reading 50.55a Codes and standards, 50.55, PART 50 etc won't get it. Getting into the reg guides and incorporating them with your program is a RPIA.
http://www.nrc.gov/reading-rm/doc-collections/reg-guides/power-reactors/rg/division-1/division-1-21.htmlAs for millions to stay compliant, yes it can. As for going for any of the stamps the first time, and new quality requirements, the extra cost of that depends on where you started.
It can be done, but if you don't have someone on board that has experience with it, it's going to be exceptionally costly, and painful.
My take on it for what it's worth.