Need help shedding 3/4 ton - Lithium Battery project

Those Battle Born batteries are great if you can afford them. I just couldn't stomach spending $1,000+ per 100 ah. I thought about it but just decided to go with a couple of Duracell 115 ah 6 volt deep cycles which I got on sale for $100 a piece. They last 5+ years. Yeah, you have to add water sometimes, and they're heavier, but that's the trade-off. The Battle Borns would have to last 25 years at that price. The EV people say the prices on batteries will be going down, but they just keep going up.