Don't fail to try again
A plan may fail, but that doesn't justify the end of vision. It simply means that your plan did not work for that vision. Instead of fainting, review the plan again, make amendment, and fire on again. When plan fails, that defeat is temporary and not permanent...
Change plan
Switch to another plan, as the failed one may not be sound enough for the journey. Sit down with the end picture of that destiny and create another path to it by visualizing, meditating and getting opinions from those ahead of you.
Seek assistance
Most people find it hard to ask for help. Asking for help from experts and those ahead of you in any field you find yourself doesn't mean that you are weak. It only means that you a willing to learn and gain experience. Life and time is too short to go through all the plans to find the right one.
You can modify existing plans by others to suit the your vision. It is what many others have done and you will not be the last.
Biblical examples
Do not think failure is a crime. When you fail at a thing, that doesn't mean that you're a complete failure. It simply means that you have not done or gotten everything right. We all have to accept the fact that along with strength, we also have weakness. David conquered Goliath but could not conquer sexual temptation, Joseph did. Elijah faced the prophets of Baal, but ran from Jezebel. Just let Christ be strong in your very weakness, let Him be your strength in your weak days.