Your suggestion to map rocky zones first has merit, but it can lead to missing other important details. A full survey often catches issues that isolated mapping misses. Starting with a broad overview tends to work better.

But what if you need the money now?

Rushing trains your muscle memory wrong for when you return.

Last time I traded a camera at Best Buy, they just turned it on and clicked the shutter. Most places do a quick check, not a full look inside. If you get it working, it might pass without you lying about anything. The store checks it themselves, not you. You did the repair asked of you. I doubt this is as big a moral issue as it feels.

Your buddy's tarp story proves marketing teams hate one simple trick. Bet those bricks held better than my thirty dollar aluminum stakes that bent in soft ground, faith_palmer51. The expensive stuff spends half its budget convincing you it won't fail. Meanwhile the ten dollar tarp just sits there doing its job until it literally turns to dust.