There is enough space in that little precinct that you could transform it from a ghost town to something quite worthy of drawing guests. The catch is to make sure the scooby evac points aren't obstructed.
Quite honestly I think the solution for that whole area is pretty simple -
knock out the old shop and associated structure, clearing the way for a pathway behind showstage, and past the scare sheds to West to become a permanent addition.
Get a flat or two between the courtyard and west. theme them appropriately.
Ensure that maintenance access to arkham isn't obstructed in this process
Make sure the transition is done right
Demolish the stupid raised queue platform in front of the old arkham theatre
Use the theatre, and the space left by the queue platform for some sort of asylum themed outlet - perhaps to replace the old lethal shop, or even maybe as a food outlet serving treats or meals themed around an asylum (nothing comes to mind but i'm sure creativity exists that could fill the void)
Carts could find a home up against the old chinatown building wall (backend of scooby queue) - again themed appropriately - potentially other outlets (hole in the wall style) could find a home here - get a 'jailhouse' (temporary) tattoo... Mugshot (greenscreen) photos, move special effect makeup... these are a few simple ideas, but i'm sure with the technology out there theres a bunch of other things you could do with the spaces..
I'm sure there's plenty of other things to go with, and i know you said money being no issue, but i'm not out to be extravagant with this, i'd like to be more realistic so they can fix this area of the park...