Potential Problems

I have listed some potential problems for my main task, such as the location. a warehouse would be ideal for the film but i may have some difficulties finding a building suitable. For the opening credits i would like to have blood as the text, so i need to find a recipe for some fake blood that will look realistic in the film. Another problem will be actors, i need to find people who are available in the shooting schedule and who will be in their free periods if we shoot in school time.