1 MB of RAM ?
A little more research could make this an interesting story. Check the bill of materials. My first Google hit for "price of 1 mb of ram in 1983" leads to a site listing the price of 1MB in January 1983 as $ 2,296. And at the start of the quoted Lisa development period (1978) said item was priced at $24,000 (July 78).
Then you have the 2 x twiggy drives, Motorola 68000 and other chips. No doubt Apple could get good deals from suppliers, but even so, components were eye wateringly expensive in that era.