The same financial estimate must be made within the digital video world. Are you going to buy your camera, or rent it? Should you use standard definition digital video or high definition? The answers to this rely on the over all length of your production. If your planned production will take more than a few weeks then renting a digital video camera may be unreasonably expensive. Also factor into this if you are going to make more than one film.
The big choice here is between standard definition and high definition, and the rule now is that high definition is always the better choice in the long run. This still may not ring true for your purposes. If you cannot afford a system that will edit and disseminate HD video then you may want to think otherwise. This is especially true if you are using older non-linear editing software, have limited storage space, or less than optimum computing power. If your film is headed to internet streaming distribution, cellular phones, or other low resolution areas then you may not want to waste the money on an HD camera.