Out of curiosity, would you still recommend the L3+? As I've got my 3 out of retirement to run a bit more and expect to re-retire them by November when the L7+'s will hit the market (or October when Bitmain is "testing" them). But that's with 15-20 cents EUR electric pricing, for most of the year. If the difficulty will triple (which is the lowest of my expectations) unless LTC goes 3 times up, I don't see them running much longer.
To be honest, I doubt that the cost of Litecoin will triple, otherwise the capitalization of the entire market should be 5 or 6 trilons, which seems to me a colossal figure. So I suppose L3 + will become obsolete by this time ... especially considering the very high cost of electricity. By the way, when you talked about Bitman, what did you mean? It's just that I have heard more than once from different people the myth that before the delivery of equipment, Bitman uses new equipment for some time, in fact, sending the used goods.