There is No way to predict this nor answer this accurately. Anyone who does is misleading you. Make sure the guy you hire is using good equipment. A photo or video from cell phone has its place, but surveillance from a vehicle and over distance requires that investigator to actually have some good video or camera equipment.
Factors for success.
- Accurate information about subject of surveillance. This means a picture, car information, correct addresses of work and home ( or where they are putting their head at night). We need a good starting point for surveillance. If we want to know where they work we start with home. If we want to know where they are sleeping, we need a work location or other fixed starting point.
- Subject’s activity level. If they don’t leave the house, then we are not going to see anything.
- Location of surveillance. Is it an accessible location? Will an investigator have to blend into a rural or city or suburbs setting? Is there street parking? The geographical location itself is vital, is it on a busy road and there is no place to physically watch from a stationary position?
We can only predict that WE will be in the best position available at the best time to capture what is needed.