In considering a condo -
There is an association fee that must be paid each month or quarter. How much is it? What does it include? And much can it go up each year?
Remember, as a landlord, that's one more hand in your pocket eating at your cash flow.
-What special assessments are coming up that owners will be responsible in helping pay?
-What are the association restrictions for the community? Are there age restrictions and pet restrictions?
-Does the condo association have to approve prospective tenants? And what is the criteria for a tenant?
-Per the association docs, what is the percentage of rentals to owner occupied units?
As mentioned, real estate markets are local in nature. Contact a knowledgeable agent in your area that owns investment property of their own and have them go over the pros and cons of owning single family vs. condo in your area.