LTR and Return on investment, Is my math right?

[Alan Phan]

Looking to purchase a 2nd home for LTR.

Thinking of a 10% down, monthly mortgage is around $4,300; however, it looks like rent around the area goes for $3.3k-$4k max - does that mean i'll have to eat up the $300 monthly OR put a higher downpayment to lower the mortgage thus pocketing a higher profit? Am I missing something here? Thanks!