Find out exactly what it's going to take to get what you are trying to do done! Take it a step further and account for the unavoidable and the unexpected if at all possible.
Ask who, what, when, where, why, how, and how much for every avenue that you're looking into that applies to your vision. These might seem like elementary questions; however, they will help you to put things in to perspective quicker so that you can move forward in the best way.
If you can't answer all 7 questions in what you're looking at, then it may not be an avenue you need to take! Have all of the information that you need before you move forward.