Of course. But besides the cost of demolishing rides, eateries, and buildings in DHS, this would also reduce the capacity of DHS for maybe 3 years. DCA's suffered no such reduction in capacity because Carsland was built on a parking lot. So, $50 to $100 million for the difficulty of building Carsland in DHS, plus the loss of maybe 1.5 million guests each year to DHS for three years, that would be a total of maybe 4.5 million guests lost over three years, and if they disney makes 100 bucks off of each guests . . . you're talking about a lot of money.
Frankly, I can see why it would be cheaper, and a better long term option. to build on DHS's designated expansion lot west of World Drive. They could do it without ripping out part of a park that is making money, and when this expansion is finished, they'd have more rides. Even if it costs 100's of millions moving World Drive, might be about the same or cheaper when you talk about shutting down 1/4 of DHS for three years.
How much does it cost to move a freeway? I'm thinking hundreds of millions, but you can see why this is the preset expansion plan. Folks who know more about the issue at the company already thought this out.
That being said, Carsland would probably be $800 million at DHS, at least, if they do either option, probably less with expanding west of World Drive. You can why the report hints at expanding AK with tons of land inside the park ready to go.
It would actually be cheaper to build Carsland east of the Magic Kingdom parking lot in the massive expansion pad, of course they'd have to build more for a half-day park, but at least they save hundreds of millions in costs when it comes to moving a major roadway, plus there is room for parking lot expansion there.