I'm lucky in that I spend five weeks out the country working then five weeks in the country off enabling me the time to pamper the car.
There are great detailers out there who can do it for you if you want it done. At a price of course.
Similar here...
2 weeks away, and 3 weeks at home.
It's not uncommon to wash, wax and clean inside 3 times a week or more...
It helps if you have a garage full of detailing products and a mate who is right into it!