Question 1: Is there a apportionment procedure?
If not, then the very simple answer is: You are allowed to pay the development costs, but then you will end up with an unsellable property.
If yes, then question 2 follows: Will your property be included, provided you do not sell now?
As I read your initial post, you will end up with a property that is just as unsellable as it is now. For a measly 3,600 sqm, a) the municipality, unless there is huge pressure, will not make any special effort. And then there are many nice properties around your land that the municipality can divide exactly as an investor/buyer needs.