Which is better investment? Better market value or better cash flow?

[Teague D.]

hey folks, I'm a rookie so please be kind.  I'm wondering what you think is a better investment for a guy in my situation.  A single family home in a good area with a good possibility of the house value raising with $210 monthly cash flow (using 50% rule).  Or, a triplex, in a much less desirable area, but with a cash flow of nearly $550 per month (50% rule). 

Things to consider: I do not plan on doing this full time. I am looking to make my FIRST real estate investment (other than my personal home). I would like my first investment to be a very safe purchase and am willing to sacrifice some cash flow for security until I get a better grasp of the process. 

Thanks so much for any feedback. This site is awesome and such a supportive community!

-Teague D.