Watermelon and feta are reliably available at every Charlotte-area chain year-round, and lime, cilantro, and serrano peppers stock routinely at Harris Teeter, Food Lion, Publix, and Kroger—no special trip needed. At roughly $3–4 per pound for watermelon, $4–5 for decent feta, and minimal cost for the other ingredients, you're looking at $1.50–2 per serving for eight servings, which is solidly economical. The 15-minute timing is honest if your watermelon is already chilled and cut; however, this is a same-night dish that does not reheat well once the feta softens. While it's light and requires no cooking or constant attention, it's also a summertime-only proposition in Charlotte and reads more as a side or light lunch than as a family dinner anchor.