easy to switch vehicles

Hi! I don't own a car but frequently rent them and use car sharing services. I was wondering if anyone has a recommendation for an easy solution that has minimal installation.

Dear Forum Colleagues, what camera do you recommend we purchase? We need to switch cars every couple hours, so it needs to be a camera that is easy to windscreen mount or other mount, and to power through the cigarette lighter, or charging the battery overnight. FURTHER Front is 90% of what we...