Crane from the neighbor on my property

I would also say, make clear conditions, so everything must be completely removed by date X (unless you could use gravel in that area or need the additional soil...) and then it’s okay.

And then you should consider what might possibly make your work easier in a few months and agree on this at the same time in return.

How realistic is it that the crane will be gone by the time you want to start? A few months is not that long... With stone from stone and a pitched roof, the neighbors won't be finished in 3-4 months. Especially since bad weather could also come now.

But you don't need a crane permanently. For example, with us, no "fixed" crane was installed at all, but those on vehicles were used.

How long a crane is needed depends on accessibility, the house, and the construction method. Therefore, just clarify. If it fits, help the neighbors. It will surely pay off later. Whether during the construction phase or afterwards.

With stone made of stone and a gable roof, the neighbors won't be finished in 3-4 months

Without a basement, 3 months for the shell including the roof should be rather normal

If you also need a crane for your construction project, you could, with appropriate agreement, have it installed in such a way that it can be used by you after the neighbor's shell construction is completed. This way, the neighbor saves dismantling it and you save setting it up.