My buy to let property portfolio is within three miles of my main residence but I would venture further out. My main concern is that I won’t know other areas as well. 

In the past I’ve looked at Rightmove to understand how much properties can be rented for and how many have been let recently. Also, whether its close to a mainline station, town centre and access to motorways for commuters.

With living in the south, places are more expensive and therefore require a bigger deposit.

What are the key things other landlords/investors research when identifying new opportunities with limited knowledge on location?

Thanks

Paul