We looked at lots of kit homes before we built our house as owner builders.
I was at work one day and one of my clients came a builder, I told him we were thinking of getting a kit home, he said why, have your own kit built. So we had plans drawn up and got our own permits oh took three months long service leave and built the house, got the most wonderful slab and my husband made the frames but he did not have to you just take the plans to the timber supplier and they design the trusses and wall framing and deliver them to your site.
I guess you are not looking at doing it yourself but getting a builder to build a kit and this may not be cheaper. It would be just like getting a spec home built by one of the builders I think.
Have a look at the web sites
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