I will see about that as an option too I guess. But I'd hate to blow $100 on batteries and have them not last. At least Walmart ones are a year warranty, but subpar cca for an IDI.
I guess the Walmart Maxx batteries are the best choice still cost, warranty and ease of warranty replacement.
I have thought about 950cca truck type batteries but they cost $20 more each, only have a 1 year warranty, and they might have hood clearance issues.
https://www.tractorsupply.com/tsc/product/traveller-31p-heavy-duty-battery?cm_vc=-10009
Napa's are about $30 more, after 10% off, but have 18 months free replacement.
https://www.napaonline.com/en/p/NBE7237
But Walmart maxx 65s are still 36 month free replacement (twice as long) for a lot less money.