Is a development plan change necessary? Who bears the costs?

Hello everyone, I have the following situation: After preliminary discussions with the municipality, I received a plot of land in my aunt's garden. This was partially gifted to me and has not yet been surveyed. In order for it to be developed, a change in the development plan is necessary. Since the plot is on the outskirts and the adjacent meadows will become building land in the next 3-4 years, the municipality is very willing to change the development plan... However, only in 3-4 years. If I want it sooner, I have to apply for and pay for the change. I would thereby create the basis for all plots on the street in the garden to be developed. But do I have to pay for that alone? I could now go door to door and ask on the street who would like to participate. However, they would be stupid if they did, wouldn't they? They could benefit from it anyway. Is it possible to regulate something like this contractually with the municipality so that I don't bear the costs alone? Is there anyone who can give me advice on how best to proceed here? I would be very grateful to him?

Put differently: who else is supposed to pay for it?

Joke aside: everyone on the street who would benefit from it. Every property gets something out of it :)

What would the neighbors have from a development plan? Would you want to pay in your existing bungalow for your neighbor to have the development plan changed so that he can build two stories instead of one?

No, rather: You have an electric car and want to install a wallbox on the street that everyone is allowed to use. Then only the neighbors who buy an electric car benefit; the others simply lack an additional public parking space.