I don't believe that monetizing music and maintaining "a very quiet life" is possible. Making money at it requires a lot of work and a lot of putting yourself and your music out there - social media, etc. The money that can be made in streaming is so small as to be irrelevant, unless you can amass a pretty large fan base/following, which (again) requires a lot of work. There's a lot of people competing for the same streams/ears that you would be.
I think the suggestions by Jim and others are your best options. If those don't appeal to you and your lifestyle, I absolutely understand & respect that, but it probably means you should accept the notion that the idea of making any income at all is unlikely at best.
Not trying to be discouraging or a Debbie Downer here, just a realist. Best of luck to you with your musical efforts.

http://www.rogerbrownsongs.com
http://www.nashvillesongwriters.com/roger-brown