Karsten, that's how it is. My parents renewed the glass in their mahogany panorama sliding doors (built in 1978), but only with double glazing. Better values, affordable and good is fine. But only because the 15 sqm by the sofa was a bit drafty. They left the rest of the windows as they were.
Unfortunately, it is also true that even a new building on vacation cries out for the garden to be kept in tiptop shape from time to time. Not to mention the savings in the first years through your own work: first year terrace construction, carport and storage room, second year better structure of the beds and a few more lovingly planted areas than shortly after moving in. Third year the second terrace at the end of the property, compost system, vegetable bed. Fourth year then the small children's houses and play equipment are due. Every autumn tree and hedge trimming, every spring major fertilization and cleaning of everything. If you don’t see yourself in that, then better look for a condominium... :)