We are currently seeing this with our local GU. He is actually a small structural builder with 2 construction yards in the region and offers everything: flood protection, industrial buildings, renovations, commercial construction, etc. etc., and of course single-family houses. In this sector, he belongs to a nationwide "group". Business is running extremely well at the moment and to take on all the orders, (I think) he has multiplied his own construction crews (earthworks, structural work, roof truss, etc.) by splitting up the established profit crews: each team member of an old construction crew is now a "foreman" of a new construction crew and has 2... 3 "less skilled" workers assigned to them. But that also means: they handle rather simple standard houses better than complicated buildings, where actually everyone on the team would need to be a professional. However, if only one person on the team is capable of reading plans, measuring a wall length, and also adding up 3 measurements, that is unsuitable for more complex executions. It will be no different with companies in your region, and as long as there are enough "simple" orders where not much can go wrong, people prefer to keep their hands off complicated cubatures with high static requirements and many unusual details.