but be aware difficulty is going up big time due to bitmain kicking out units like toasters..thus use a calc like
So anyway difficulty has gone up 100% on LTC in last month.thus any static machine in the barn you own is now making 1/2 the coin
On the other hand, there is no miner more efficient than the L3/L3+ right now, so folks will STOP buying them when they get to be low-enough profitability.
Also, Litecoin price has kicked up about 6 times in the same timeframe that the difficulty has doubled - and Bitmain seems to be having the same "limit of chip availability" issues with the L3/L3+ that they've shown with the various S9/T9/R4 batches limiting HOW MANY they can make, which should keep the difficulty increases somewhat in check for a while.
For reference, my A2 farm is MORE profitable right now by a wide margin than at any other time since I bought the things except for about a 1 day period right before the last diff jump - despite the massive increase in diff since the Innosilicon A4 was first introduced. Gonna take a major Litecoin price drop and/or a LOT more of a diff jump before the A2 gets to be unprofitable, much less the Titan A4s or L3/L3+ units.