You don't want solo diver imput, even though you contemplate solo diving, hmm.
When I was in college and already long solo diving I worked off and on at a dive shop. People were constantly calling and wanting to hire a diver to find:
cars that rolled down the launch ramp
boats that rolled down the launch ramp still attached to the car that rolled down the launch ramp
outboard motors
fishing gear--grandpas favorite reel and pole
wallets
shotguns
"unknown" items--just go down there and see if you find "something"
Ninety percent of the time they had only a vague idea of where the item was even if they thought they knew exactly. During the wonderful polyester 70s divers were still not completely common in many areas. I took many of these jobs and the deal was money up front and if I found the "wallet" great and if not, too bad. I was a poor college student and the money came in handy for books, gasoline and a Texas Instrumennts SR51A scientific calulator that I recall cost 250 dollars and took a month to get just in time for the most horrid ever chemistry test. I passed.
I got run over by a tug boat pushing a barge while on one S&R, it sucked me off the bottom despite my Sea Hawk stabbed in like an anchor and then spit me out behind the tug. The captain of the tug had eyes the size of a saucer and they rescued me. That caused me to be late for palentology, I walked into class, late, wet, bleeding. My prof asked what happened, I told him "nothing" in the same kid attitide that only sub 21 yos can get away with. Something about walking into class, wet, bleeding, missing a flip flop and a big dive watch, worked out good.
Diver for hire, money up front.
N