If you can stretch to it then look at buying, works out cheaper in the long run and gives you an asset, we bought this a couple of years ago, this is a photo from when I bought it (3200 sqft) with an office and additional floor space on a mezzanine (900sq ft)
wherever you take ,have a good look at the electric meter ,is it moving when you are not there i used to rent on an ind estate and when a unit was empty other would dig a shallow trench/tunnel and tap into its electric whoever then moved in had no idea .