The pinecil will go up to 126w if you have a capable power supply. I am going to be honest though, 16awg isn’t that large. A 45w iron could probably handle that fine if you are ok with waiting a but for your wires to get up to temp.
Sorry I thought it was 60 cause that was the newest one but looked at mine it's the haklo station 70w. Pretty sure it's 70w but could be just 70w at startup.
So, in your mind, $0-10 is enough margin per unit? Do you think that this is literally just an existing soldering iron with a battery pack hot glued to it? That's not exactly how product development works.
I'm no capitalist, but I do understand how markets work, and things like IP and patents. $60-70 would be stupid, and they would likely lose money (assuming your price estimations are correct, I don't know enough about this stuff to know that)