One thing worth looking at is the distinction between a true DIY kit home and a modular building that arrives largely finished. The latter can save a lot of time, but you still need to look closely at transport, foundation requirements, utility connections, insulation, local codes and how much work is actually left once it arrives.
For anyone considering modular construction beyond a permanent house,
Asset Accommodation has some useful information on modular units and temporary accommodation for hire. It shows another side of the modular approach where the main benefit is getting a usable structure on site quickly rather than assembling every component yourself.
For a homeowner with moderate building experience, I’d compare the suppliers based on how much site work they leave to the buyer. A cheaper shell can become less attractive once foundations, plumbing, electrical work, insulation and interior finishing are added. I’d also ask each company for a detailed breakdown of what arrives pre-built and what still needs to be completed on site.
