A couple points in this thread are a bit suspect...
1) 24V LiFePO4s are generally not a good buy in today's market IMO. Almost all the 12V budget buys can be wired in more than 2S so 24V is easy w/ 12V QTY 2 and almost always cheaper for reasons i don't understand. You'd think buying in bulk would be cheaper, but I guess because 1 beefy BMS is more than 2X the price of 2 smaller BMSes, it makes sense to go smaller and wire in series to save a buck.
2) I have yet to come across a 100AH budget LiFePO4 that can't do 60amps. LiFePO4 is naturally a perfect fit for trolling because most trollers are sub-50amp and if your LiFePO4 can't do 50 amps (0.5C?) then something is wrong with that LiFePO4. Even the largest trollers that say 60A peak will almost never hit 60A unless you overvolt them. Trollers will consistently perform at ~80% of peak at WOT in my experience.
I don't have any videos showing deep-dives of 24V trollers yet, but I'll be making a few of those soon. For the first one, I'll be using 2 Chins 12V 100AH in series. I've previously tested those batteries in series at 36V and 48V on marine motors so I'm quite confident they will do fine. LiTime, TimeUSB, and other budget packs are known to be of similar build quality, so they'd all probably do fine.
RE: waterproofing, the only time that matters is if your battery needs service. No battery's terminals are waterproof. They're made of stainless steel in best-case scenario, which is decently corrosion-resistant, but should never be splashed or submerged. Waterproofing only matters for keeping the pack's internals dry, and all the cheapest LiFePO4s are sealed, so as long as you don't crack the case open, you're good. In fact, I capsized a boat a couple months ago, and my Chins was in the drink for a couple minutes. It floated near the launch ramp until I had time to retrieve it. Dried it off. Works like new.
When they call a battery "marine-grade" or "marine-ready" it can mean a million different things, but usually it means very little. The one exception is the Epoch, whose "marine-ready" version is pretty cool. It has stainless mounting inserts built into the case, AND a high-quality custom-designed rubber seal at the lid, making it the only pack I know of to achieve IP67 waterproofing AND screw-top serviceability simultaneously. Most packs have zero serviceability, but serviceability AND waterproof seal? That's cool.
All other batteries claiming "marine-grade" or "marine-ready" are nonsense unless they are competing with Epoch's features. Often, brands will call a battery "marine-ready" for no other reason than it happens to be a deep-cycle. Very sneaky.
If you're not concerned with cold weather, I'd advise you search "12V 100AH LiFePO4" on Amazon and buy the cheapest bargain you can find as long as it has at least a 100amp-capable BMS (which almost all the 100AH packs do). The bargain buys in 2023 are plenty high-quality enough for a typical troller. If you are in a cold climate, I'd look for a pack that has an internal heater. They tend to be double the price. Or, you can just charge it in a heated room at home. They don't need warm weather to discharge, only to charge, so buy the fancy heated one only if you intend to leave it outside while it's charging.