Most space solar advocates prefer satellites, which have fewer losses and, at least right now, easier manufacturing issues.

As far as pointing issues, I did a lot of research on things like this in years back. The transmitter in space creates a broad beam that is pointed at a "rectenna farm" on Earth. This is a conductive net or array, supported on pylons some distance over the ground, that covers many acres. Sunlight penetrates it easily, and the land underneath (insulated from the power beam) can be used for agriculture or nature reserves. It could also be built over lakes or bays, but that would make maintenance more difficult.

The beam is designed to cut off if it leaves the receiving area. In addition, it's spread out enough that the megawatts are not deadly. I've seen figures of around 20 watts per square centimeter. Maximum permissible leakage from a microwave oven is 5. You wouldn't want to stay under such a beam very long, but it isn't going to fry you, or birds flying through the area.