My feeling is that like you said, " I'm and old man."
Enjoy what time you have left...if you really like Starbucks Guatemala Laguna de Ayarza coffee then that's what you should spend YOUR money on...some enjoyment every morning when you crawl out of bed.
What are you going to do with your money...leave it to me?
There is no way you are going to be able to roast your own and make it as good as Starbucks and save money...that's what they do and they are very good at it.
I'm with you. There is nothing like a great cup of coffee in the morning. By the way, we start ours with Starbucks Kenya.