Several of my friends and family members own or have owned rental properties. It can be a great way to generate passive income. However, one common complaint that I've heard from them is that the income they make isn't nearly as passive as they'd like. Headaches of owning rental properties include dealing with difficult tenants and unexpected repair costs. You don't have to limit yourself to real estate to enjoy steady and dependable income, though. Ares Capital (ARCC -1.25%), the largest publicly traded bu ...