... post Plantera would make it appear at a time where large quantities of money can be obtained just by going out and killing things...
And that’s why about 80% of my income comes from the dungeon.
Later in the game then. To be honest I'd prefer it between the mechs and Plantera, but apart from Steampunker there's nothing else to mark the progress thereabouts. Because pre-plantera, Chlorophyte Bar farming is quite profitable and it's easy to setup(though not effortless). With 25 5x5 blocks 100 ft away from each other, you'd get upwards of 400 ores per solid trip. And that's 60 gold coins worth of bars, at least.
I would prefer that the recipe would not include Ectoplasm. If anyone can suggest either a different Crafting Station or material that I might take into consideration, it'd be good. I'll be updating the OP soon.