Should I use point to point or LAN ethernet 400ft. to my garage?

I need wifi in the garage. My garage/man cave is 400ft away from the router.

My options are:

A- Direct Bury Cat 6 ethernet cable + add cheap router in garage = wireless

What is the max distance/length that ethernet cable can trenched? I am aiming for max performance/upload/download/streaming.

B- Ubiquiti Nanostation + add cheap router in garage = wireless

I want the best bang for the buck.