Preparing offers costs money. The one who ultimately buys pays for it.
At least the interested party should know what fits on the property. It might also serve as a marker to classify the interested party. As well as an approximate budget and room program.
We visited three providers.
1. Provider (small, regional) takes the room program, desired size, budget, looks at the property, and starts sketching with a pencil; eventually, an offer came.
2. Provider (large) receives the same information, adapts a model house to our wishes, gave us an offer in which special requests were already incorporated, and told us it wouldn’t proceed without an architect. He can’t do that. The pure prefabricated house part was extremely efficient and well developed. The house suited us; whether it fits the property is another matter.
3. Provider (medium-sized, from the region) looks at the property, talks with the municipality, records our wishes, talks to the demolition company, construction company for the foundation slab and retaining wall, obtains offers. What you want. Only the house he developed was not what we wanted. Much too large, orientation on the property was wrong, rooms were missing, washing machine in the bathroom with 230 sqm living space. The costs, certainly five-figure, should be borne by others.
Try a small provider; they have to approach offers differently than the big ones.