Compared to a lot of builds $335k is low cost, but in terms of affordability its still stupidly expensive - and my gut feel is that the benefit of smaller, pre-fab, self-assembled, lower-quality panels here isn't turning being passed through to the final cost. Also, is a CLT just a newfangled SIP? I wonder if a better option is a pre-assembled deliver & drop house, if Brittons etc can move around 120m2 Villas surely we can design 2-4 part new houses that can be built off site, under cover and then driven and fit together on site?
My first house was a 2 bed 84m2 ex state house built in the 40s. It was fine for a couple and a dog but being a 40s design there was a lot of space utilised in a way that modern houses don't do. We had a large kitchen/dining, which was separated from the lounge - nowadays open plan gives the illusion of more space at the expense of cooking sounds & smells being enjoyed by whomever is watching TV :) But the advantage is they could fit a 3rd bedroom into a small home which makes it an option for families.
Simplifying design is exactly what should be the answer to a housing crisis IMO. Nowadays we build too many houses with upper middle-class designs (and costs) because they're the only people who can actually afford houses.
But go back to the sorts of builds from the 70s & 80s. Typically around 100-120m2, 3 bedroom, rectangular. Yeah they're not architectural delights, but they kept families dry and warm.
Nowadays in a lot of places we're building in-fill town houses with a similar aesthetic and I know a lot of people don't like it but I think overall its probably a good idea. Even in smaller centres like Hastings it can work so long as we get the community spaces right as well.