Not sure on the hundreds of gallons every couple of days. My backyard pool looses about 2" of water a month on a 24' diameter pool. That is a total of 113 cubic ft of water which turns out to 845 gallons per month. Or about 30 gallons a day.
A 24' pools hols 18050 gallons of water and in Lubbock Texas in the summer at about 96-100 degrees the water stay at about 76-80 degrees.
($3500 for pool) ($30 increase in water bill to fill, $5 a month to top off and water changes) ($30 for salt to make 200 gal
, $700 a month for 25% once a month) ($2700 for salt to start)
with 2 pool pump systems for flow you would have plenty of flow. ($300 for extra pump)
Sun would provide plenty of light for anthing in the pool especailly if just having fowlr
27075 lbs of live rock for 1.5 lbs per gallon ($160,000 from lr
.com, or $23,000 from hirocks.com)
heater for winter time. ($800 per unit, two needed, $1600)
skimmer would be a PITA!!! ($700???)
Plexi panel for viewing woult need to be 1" thick. ($500) ($200 for parts)
so about $40,000 for initial set op of a 24' diameter aquarium. and about $1000 a month in upkeep including food (but not water treatments like calcium and ph