Forum:Partnership in Hospital, Theater, Diner, Bistro, Bookstore, Groceries and Spa

Okay, so in the sims 3 game. When I click the Day Spa building there is an option "Become Partner($15,000)". After I clicked, at the upper right side of the screen will appear something that says your sim is entitled to the profits of the Day Spa and if she bought out other partners she would get more money and more control over the place". Besides that your sim also receives a certificate in his/her inventory that serves as the option to get your profit after a week (Im not quite sure on how long the sim will get the profit but it takes a week, I guess)

This is it. I don't know what to do on getting me share bigger and on gaining more control over the place. I'm confused and I have two options.

Option 1: I will become a partner of all the business building in the town.

Option 2: I will buy out partners. '''The only problem with this is that I don't know who the other partners are. How am I going to buy them out if I don't know who they are?'''

I'm just intrigued about this. I searched this site for questions but I couldn't seem to find any answers to my question. I made this article not just for my benefit but also for other who might also have the same issues like mine. I hope somebody could help me.