If the thought of being a landlord is too complicated, then scratch the idea of owning and running a business. I have both, and can definitely say being a landlord is by far the easiest.
We still do not have enough personal info to give you advice. I am not big on going to a financial planner with 50k but sometimes they can lock the money up and force you to be disciplined. Just putting it in a CD is probably too tempting for the average person.