If you think scuba is expensive try flying.
Private Pilots license about 5k, insturment rating another 5K. Multi engine rating 3k. Insurance another $500 each year.
Small planes about $100 an hour to rent, perhaps 100K to buy. Nicer ones up from there easily reaching 300k to 500k.
VFR charts $250 a year, IFR another $500. GPS 2K, check rides $200 per aircraft type, bi anual flight reviews $500, medicals, head sets, hand held radios, lap desks, the list goes on and on...
there is a joke about the pilots pencil.
Painted yellow, made of cedar, six sided, graphite and clay writting element centered, approved and certified $19.95, eraser extra.