Construction costs are currently skyrocketing

The problem is called opportunity cost. Of course, you can spend the money on the land and then build on it for years. But during that time, you cannot live in it, so you have to keep paying rent in the meantime. If you don’t do the model I’ve already suggested (and which was loudly mocked here) of "moving in and renovating from the inside," then it quickly becomes much more expensive than "finishing - moving in - living there and not paying rent anymore."

... Theoretically, you could first carry out the founding. Leave it for three months...

Theoretically, one can (proven) work one day per year on the construction site. You might not be finished in three years, but the building permit can be extended beyond the three years.

In theory, one can (proven) work one day a year on the construction site. Although you won’t finish in three years, the building permit may be extended beyond the three years.

No. That’s not possible. With your phased construction (for example, first the ground floor, then half a year later the upper floor, etc.), you must prove a serious intention to complete the construction. You will not succeed with one day of work per year. Nice idea, but unfortunately not feasible.

This has already been legally confirmed – even though there are only a few rulings on the matter. In particular, self-builders who build over years – but with an ever-increasing state of construction – have no problems with the requirements.

Monetarily, it only makes sense if you price your own work at zero euros AND can live somewhere for free during that time AND the temporary accommodation would otherwise not be rentable AND you don’t derive more benefit from the temporary accommodation than from the built house.

Please don’t misunderstand, I find such DIY approaches extremely exciting and commendable and all that. But you have to be aware that every day between purchasing the plot and moving in also costs money. This is not so directly obvious but that is why opportunity costs are also called sacrifice costs, alternative costs, or shadow price.

Maybe in the container/caravan on the property? With an official registered address at the parents' or a good friend's... Although, in the end, you feel so comfortable with it that you don’t want to change your living situation at all...

That sounds to me very much like a bachelor, 50, would like to be a drop-out. You also have to want to build for that long. For my part, I am glad when the outdoor facilities are finished in autumn and you can simply enjoy them once in a while. Gradually, it is affecting motivation and family life. And this is just one summer and we already live here