Going to the edge of ones tchum Shabbos

Are you allowed to go to the edge of your tchum Shabbos in order to be closer and ready to go to your place of work after Shabbos to answer phones and do computer work?

If your work is at a doctor’s office and enables the doctor to see patients sooner on Motzai Shabbos does this make it more allowable to go to the edge of your tchum Shabbos on Shabbos?

Your examples are very similar to the ones cited in shulchan aruch.
Yes permissible.