What is your limiting factor on brewing twice a day? Maybe adding a whirlpool tank as a seperate vessel would solve your problem. The whirlpool vessel does not need to be jacketed etc. should be cheap compared to fermenters. i worked in a brewery that brewed 8 15 bbl batches into 120 bbbl tanks over 48 hrs (two shifts per day). The limiting factors are usually hot water and a Whirlpool vessel to hold a finished batch. A two brew day for bone individual would not be too long provided you had a vessel (whirlpool) to hold the first batch while you are lautering the second.
"You are what you is." FZ