I keep seeing the word cost thrown around. What's the comparative ballpark dollar value for a guy starting from scratch?

No friend deals and nothing sitting in garage, buying aftermarket stuff at full price, blocks from junkyard or Craigslist, assembling everything himself except the short block, and also paying a shop for machining... what would be the cost to build a turn key 700hp BB vs a turn key 700hp G3 street engine, with headers and motor mounts to fit in a late 60's B body?