The need for overtime work should be communicated in advance, or there should be an explicit, voluntary, paid on-call rotation for things that occasionally need immediate attention, and on-call should be limited to things that break and need fixing, not things that need to be built.
All relationships need healthy boundaries, in this case, their relationship with work, and work's relationship with them, is unhealthy. If online research about healthy boundaries isn't enough, I recommend seeking a professional's advice (like a licensed therapist or psychologist).
Rights have been stripped from individuals and workers. We need a massive redressing of the “corporate” world. Workers rights matter. We’ve got companies that are too big to fail being bailed out by the government meanwhile companies can schedule you for just under the minimum requiring benefits but still take up as much or more of a commitment as a full time position.
When someone tells you to do something that's both impossible and utterly unreasonable, just stick to telling them it's impossible.
If he tells you you're incapable, tell him he needs to use a realistic planning for these things, and if he can't do that, then he's incapable.
There's no angle from which this is even remotely acceptable. Even more so because it involves financial transactions: writing anything related to that in such a hurry is a recipe for disaster.
This manager needs to be fired hard, or he's going to bring that company down.