She attributes the competitiveness of Chinese prefab housing to three key factors: cost, quality and efficiency.

“China’s well-established supply chains allow us to offer competitive pricing without compromising on quality,” she said

The YouTube video at the end of the article shows several issues they had with the pre-fab home, which they had to fix themselves after install. Not exactly a quality product. However, for only $25K, I'd expect to do some DIY touch-ups myself.