I admire you and I'm envious. Never having to move again would be a godsend. The price of houses here in reasonable neighbourhoods has skyrocketed. Way beyond the means of most people. Interest rates are increasing almost monthly. At least our rent stays fixed for a year.
I love that you appreciate what you have and have enough left over for luxuries etc.

My partner was born in the Shetland Islands, off the coast of Scotland, and considers himself to be a Highlander. That's the closest I'm going to get. ; )
But yes, if you can afford the castle in the Highlands, you can afford gardeners and housekeepers. All part of the grand plan.