Yeah, I researched it after the surprise. Practically for as much propane as I use, it didn't feel worth it to look at larger tanks (there's a price jump, larger ones still have limited lifespan, and smaller is easy to transport/refill). Plus I already had several 20lb tanks kicking around, so teeing them together was the straightforward option.

Down the line I figure I'll be building some sort of generator "shed", and perhaps look at using the generator exhaust to warm the tanks. A loop from the heating system would positively solve the problem, but that feels like way too big of a circular dependency.