Whether the requested services are STILL IMAGES as if it is VIDEO, any budget has to take into consideration the scope of work from the beginning.
Normally, the more services are required, the lower the individual cost of each.
This logic is well understood with the example of a physical model:
if you want to take a picture of a model, you have to make the whole model to take the picture. If you want to make 10 photos of it, the cost of building it is divided by 10. Although the amount of 10 images is greater than one, their individual cost is much lower.
Subsequently, you have to consider, from the beginning, which material you will need for the marketing process. For example: 2 exterior images, 4 interior and an 2 minutes animation. In addition to lower the individual cost of each image, you will simplify, from the beginning, the work plan of the visualizer. You will facilitate the process and that will benefit everyone: you and the architectural rendering company.