The International Space Station (ISS) sits, on average, 400km/250 miles in orbit above the Earth.
The first private astronauts could visit as soon as 2020. NASA has limited the numebr of visitors to two per year.
Whoever is willing to make the trip can stay up to thirty days on board and are required to reimburse NASA’s cost to keep them aboard, approximately 35k per day.
NASA requires visitors to use commercial US spacecrafts so Elon Musk’s SpaceX might have some more flights booked in the future.
It seems the long-term plan for the ISS will be a transition to commercial use.