Deportation cost

Control of the southern border under Obama was lax and he deported 300,000 illegals per year during his two terms. Trump emphasized border control and deported 80,000 per year during his term. It appears that Biden is going back to Obama style lax controls. Will he then deport more? Does it make sense to keep them out rather than let them in and then deport them. The average deportation cost to the government is $11,000 per illegal. During the Obama years that was $275 billion dollars which is almost as much as the US spent on foreign aid during that time.