It's not clear to me how you arrived so quickly to the conclusion that these obstacles are a consequence of "money-appeasing corrupt landowners trying to hit the jackpot".
While it's possible that's the case, it's also entirely possible that the initial estimates for the cost of land purchases were simply inaccurate.
Its a self full-filling prophecy. Now that you know the budget will expand 50%, your leverage only increases, meaning you can ask for more before eminent domain is used and thus increases budget costs, etc.
While it's possible that's the case, it's also entirely possible that the initial estimates for the cost of land purchases were simply inaccurate.