GN Builders is right: your numbers must be large and clearly visible from the street for first-time visitors, delivery people, and emergency responders. I would have the numbers on the garage and also on a stone or wood post where the driveway and sidewalk meet (with a solar-powered light to illuminate the house numbers at night).

I agree you need one near the street entrance. For 5he house location I would put it on the wall to the left of the garage door, at eye level. And probably something that had the number plus street name, not just the number.

I would do a post near the street since the entry is so invisible make sure the numbers are lit at night and some really good entry lights also

On the mailbox? Our reflective house numbers are on both sides of the mailbox post and also stenciled in red onto the concrete where the driveway meets the street.

It is very important to know how large of a setback there is from the structure to street center. Such a large property with an extensive driveway should have numbers near the street and not blocked by parked vehicles, such as numbers placed on a mailbox or retaining wall.