Could there be like an animal business like a shelter where the dogs are kept and being able to own a dog? If that is possible. Same as doing VETS for example? Let me know if possible.
Could add camping spots, where you'd have to buy to camp in the one area, depends if you could put out caravans or create an interior for it. Like a place to rent caravans, not through the main places. Would have to drive to the country side.
Also could add live casino with commands that are available same as with live poker.
Broadcasting businesses - where you can fly helicopters, get the latest news from the Police Department and all the factions that are legal that need news put out instead of having /ads, unless there's no people online to do so.