Nice tour. I don't think I could do those distances in a day even in the comfiest chair.
Did 8000 km in 2 weeks going to the NordKap and back, that was in the smart Roadster two up in a mix of hostels and hotels and the odd husky lodge.
Currently not getting may miles racked up this year, only long run in the mog this year was upto Northumberland over a long weekend. That was about 1000 miles in all over three days (lots of runs around the borders)
If you are able take very opportunity to enjoy your cars before things get in the way!
