This idea is not massive. it is not even fully fleshed out. It is just a start of what I invision. It should grow over time.
Also it is possible if enough people want to play such a game, then support the development of it and finally it gets made.
What would be those existing games about running a resort, I didn't find any on itch or patreon. I found one on Steam but it got crappy ratings and IMHO this is because all those features I suggested, are missing, so it feels boring.