I feel like the complaints of more realism and what to spend money on have been around about as long as the Sims has. They technically even added in the bills idea I saw a few years back. Now instead of just a mortgage we have "bills" based on a mortgage or rent and then electricity and water. While adding in more business types or allowing you to play a landlord might offer in some gameplay, it'd probably be more likely to make you money rather than cost you money. Although, it's really difficult for me to make a profit from running a restaurant, generally speaking a business would just add to your surplus of simoleons.
