Now retired and mine indeed only gets used on sunny days. 🌞The people up here that have them are relatively high on the income scale. This means it is typically a second or third car and that means they are used on sunny days and special occasions. That means low mileage and, consequently, low operating costs. I'm going against the grain on that front too, and it costs.
But....first 2 R171's I had were used as a daily driver to work. Meaning 200 km round trip every day. All year round,also during winter with snow and salted roads. They never let me down. Only regular maintenance,nothing extra ordinary.
No guarantee ofcourse,but you might get a pleasant surprise on that going against the grain thing.