When I did my PhD, I had to changed language and also move across the country. Before starting, I visited a bit with my family and old friends, but most of my spare time was spent working to earn dearly needed money.
Many years later, I am now retired from a fruitful and very enjoyable carrier. No regrets there!
However, there is only one thing that I feel sorry about, from time to time: I should have taken more time to be with and enjoy my family during the period preceding my departure.