that's about a $4k USD PLC.
I had to look at the cost savings of using Automation Direct hardware instead of M340 and I found that we could save 25-40% if we used non isolated IO, which for our applications (power plants) I think is asking for trouble calls since there are so many different voltages, neutral currents, different power systems on the generation and transmission side, and analog sensors run hundreds of metres off the ground grid to measuring sites by the river where they are susceptible to potential differences due to transmission system faults and lightning.
So maybe you could use AD hardware and get down to $2500, but personally I like the unity software and the $1500 savings wouldn't be worth the hassle of 1) re-programming 2) working with crappier software and hardware going forwards.