I have one main test that most of my decisions have to pass: "Is it sustainable?"

Any path that isn't sustainable is destined to fail, and the wise choice is to abandon it for a more sustainable path.

Sustainability might be defined as the ability to at least EQUAL the return on investment. As long as the path pays for itself and maybe earns a little more, you can stay on that road forever.

But if something costs you $400 per year and earns you nothing, year after year... it fails the sustainability test.

(my 2 cents, YMMV...)

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0