So what's their target market then? If you're building a new house you need to be able to plan construction. Waiting a seemingly arbitrary amount of time for yo

So what's their target market then? If you're building a new house you need to be able to plan construction. Waiting a seemingly arbitrary amount of time for your roof to be installed seems extremely unattractive. Are people really willing to put up with that? Or is the intended target market just very old houses that are being fully renovated?