The question would then be what kind of house, from which manufacturer. Not that one/I would want to get the cheapest crap, but maybe you could also snag some bargains here?
How and with whom you want to build is your decision. We have a range of about €50,000 between the offers, which is largely due to the equipment (home technology, many more and larger windows) as well as an extension for the technical room (while otherwise it is integrated in the house) and once the upper floor as a full storey. It also plays a bit of a role whether a provider has to maintain 15 model houses and pay commissions to the representatives sitting in them or not. The commission for a particular provider only comes at the end, first think about which rooms you need, what you need them for, and how big they have to be. When comparing providers, always pay attention to the construction description, especially what is not included. Many providers shift all risks and coordination of preliminary work onto the builder, but there are also providers who take care of earthworks, sewer works, etc. Don’t let yourself be fooled by any provider claiming superior construction methods; you can build either solid or prefabricated homes up to energy-saving regulations or KfW40+ if you want. From building permit to moving in, both construction methods are about equally fast. It can also be worthwhile to stroll through a model home park and take catalogs from the providers. Flip through floor plans and see what you like, clarify the basic style (gable roof, Bauhaus cube, etc.).