You want to point them at a hardware/service solution they can setup themselves or with minimal help from you such as Oxblue.

If this is a jobsite you're not going to be at all the time be wary: you will be the 24/7 service support person. When the cam drops offline they will expect you to get there and get it working again ASAP. Only do it T&M and let them know you will charge for callbacks when the camera(s) go down, and they will. Or they'll want them moved once or twice.