Stress
Imagine plunging all of your money into a single investment, then spending every waking moment of your life making sure your investment is actually making money. Now imagine that in addition to that, you have to make sure your team is happy and actually doing a great job when you're not around.
Then imagine that there's a whole company watching you, and if you slip up not only will you lose your money, but possibly will get the boot. That, approximately, is the load that hotel chain owners have to carry.
A big problem with hotel chain ownership is you're not necessarily limited to dealing with problems while you're on the clock. Emergencies and building issues happen around the clock, and when problems arise at your hotel, you're expected to handle them. Sure, you'll have managers to help out, but it's essentially on you to make sure everything is always in tip-top shape.
Your phone will be constantly ringing and everybody will want your full attention right this second. Whether you're dealing with building code issues, customer complaints, or any other one of the billion problems that could be hurled at you at any minute, this job will keep you on your toes. Better invest in some pointe shoes.