One nice lady paying a deposit doesn't really prove much, that's just one good customer out of who knows how many. Sounds like a run of bad luck more than a system that needed fixing.

A surface interval graph? For a Tuesday fun dive? That is wild to me. I keep a log too but mine is a $6 notebook from the bait shop with depth, time, and a note like "viz bad" or "saw a turtle." Fourteen fields and boot chafe notes sounds like you're writing a report for a boss who doesn't exist. Your dad's "good" or "rough" told him everything he needed to know about whether to go back down tomorrow.

Been there, quoted $150 for three days of work once.