Buy and hold cash flow

[Joseph Billow]

I'm not sure if there is "one" answer to my question. However I'm not sure how one should determine cash flow on a SFR or small multi family Buy and Hold. Specifically in regards to the term of the mortgage. Is it common practice to amortize your loan over 30 years or something less? Because I am a bit older (late 50's) I was hoping to cash flow with a 15 to 20 year note so as to quicker build equity while still being profitable. Is it as simple as, "do you want cash flow?" or "do you want to build equity?" I'm just trying to determine what is the best business practice.