I'll preface this by saying I'm not a boat builder
and have never owned a steel boat, but here is my 2 cents worth. Long flat sheets
like that used in hard chine construction can be difficult to keep straight (because of heat distortion) for the amateur fabricator and the welds don't necessarily have to look great to be satisfactory for the task. But if the workmanship on the fabrication looks to be of poor quality then the question has to be asked of the rest of the boat's construction. To me (as someone who has been involved in steel fabrication for the last 30+ years although not in a shop floor capacity) the most important consideration for me would be
- How long did the hull take to build. If it sat around on and off for years, corrosion would have had a chance to establish itself in the nooks and crannies even before it hit the water
- How was the steel prepped for surface coating. Ideally it was sandblasted to the coating manufacturers specification
- What protective coatings have been used
- And finally, how easy is it to access the usual corrosion trouble spots - i.e. the bilges, under the head, behind the insulation etc
IMHO Whenever you see a boat of that type of design (long straight sections of plate, straight lines and hard chines) it just screams "designed for the amateur builder" so you would expect to see the vast majority of these boats home built with the expectant variation in quality.