In Doral the prices of single family homes have slided downward, just like the condo/townhomes, however the ratio of condos/townhomes is much larger than single family homes, so an an investment the single family home is much safer bet.
If you are willing to invest for the long haul, then it doesn't matter whether it is a condo or a single family. Buy quality, buy location, and certainly, buy within your means, and you'll be successful. If you would like to discuss it more, feel free to contact me.
Anyway, if I would have to decide I will say a townhouse will be easier to rent. A single family home will be my choice if its a fixer upper and I can buy it at $150 per square feet in order to have a decent gap for repairs and profit.