So, I've gone ahead with the resort option of the Hanging Gardens project. @Jessabeans I saw what you meant about the restriction when I discovered the need for a "tower." I got around that by burying a beach tower under a better structure and running some stairs down to the basement to keep it available for functionality. I'm pretty sure there's no reason to ever go down there in normal gameplay, and once I start game testing it I'll minimize the available space to keep Sims from loitering down there. But, otherwise, I think everything else is do-able without effecting my theme.
Here is a peek at how it is coming along...
https://i.imgur.com/z2FopfA.jpg?1
The "requirements" for a resort, as I understand them, are met. The pool is inside the main pyramid. There is a bar area to the lower right, across from the "party area." As mentioned, the tower is buried under the building to the left, with the check in desk and dining area on the main floor. The second floor holds the gym. The flat topped building in the center is a premium room, with en suite. A couple basic rooms are across to the far back left, with a shared bathroom in a separate building between them. (Not sure if that works, but I liked the concept.) Finally, in the far back there will be a wedding area.
This is a view from the opposite side, showing the standard rooms to the right and the premium room on the left.
https://i.imgur.com/17UNYJK.jpg?1
There will also be a secluded spa area on the right of the pool area with a couple massage tables and a sauna. I am trying to leave the back of the property pretty much empty so that the lot can be easily placed on a beach front lot. Assuming that there exists a 64x64 beach front lot somewhere in some world!
Right now I suppose it is a couples' only resort. I'm not sure what to do if a family checks in. I'll work that out in play testing. I have room to make adjustments if necessary.