$133/kwh
bigbattery.com
$395/kWh
The 100Ah 12V LiFePO4 Deep Cycle battery is the pinnacle of battery technology and the lightweight drop-in replacement for lead acid batteries.
battlebornbatteries.com
$833/kWh
Math checks out. Not sure I'd use it as a DIY power wall, but if you need an atypical 24V battery (these are usually 7S, not 8), this would work.
It's VERY limited on current though. 5A in or out means you can only charge or discharge at about 120W.