with that amount of hash i would have tried to go with solo, because in the past it was like doing 20 btc daily with the old diff

even now it is 1/5 of a block, so it should be quite easy to find a block, anyway you can sell your asic if they are not profitable anymore, this is a common strategy to reach roi faster

you mine only for half the roi time and then sell, you should have break even plus some profit