With the ease of the internet you can record all your tracks on your DAW and have your song mixed and mastered remotely.
Record your song, export consolidated tracks with all the same start time (bar 1 start of session)
Upload and send me your audio files via You send It, Google Drive etc…
I mix your song and will deliver a hight quality mix back to you.
You listen on your favorite playback systems and make revision notes. I will make the adjustments and so on. Usually 3 revisions will do it.