Hast ye seen the White Whale?
1. Machines do not require actions to operate (unchanged from base)
Double check the rules on this. Machines require an action, just like a regular worker, they they just don't cost any money.
Personally, I find the machines a little underpowered, because they don't get you any money.
But reversing the basic rules so that they don't need an action but do require money is an interesting twist.