Any battery you get needs to be charged/maintained if it is to last.
There is perhaps a different risk/reward calculation with Li compared with Walmart 27DCs, but it is always scenario dependent.
For the OP, what would be the higher reward in your scenario to match the higher dollar risk if the battery bank is not maintained properly?
The guys here with Li have all said they did lots of research first for their own scenarios. Doesn't mean it would work for everyone's scenario; just as it doesn't mean it would not work for some scenarios.