Based on the usage you mentioned, buying an expensive carbon bike seems overkill.
Steel bikes in any geometry are more comfortable anyway and some decent ones run less than a grand. The best ones can be extremely expensive.
If it isn’t going to get a lot of road use I wouldn’t buy a carbon bike.
Jamis has a line of steel bikes with high quality tubes and components that sounds like what you need.
My every day bike is upper end steel bike.
Be leery of affordable carbon bikes.
I have ridden the Tarmac SL6, which is the prior generation, and it is a great bike. Snappy, agile, fast and comfortable enough with the right tire for long rides.