As what I know, u can only save the labour cost for doing the welding part as they sell the kit not that cheap (actually quite expensive). However, the labour cost of welding is the biggest portion of the boat building. For instance, the one i'm after (6.1 walk around) could cost u more than 15K just to finish the welding stage and polishing of the boat by the service of boatbuilder (this is what cxx mxxxxx quote). There r still so many stuff not included such as hydraulic steering, live bait tank, kill tank, seats, back door, navigation light, painting, trailer etc. If added up, quite a big sum. A lot of things to consider thats why i need to create a detail cost planning.
Phil