Well done Trogdor.
Sounds like you've bought the exact type of premises my business operates in - individually owned buildings in a high end retail strip.
The yields on these areas are always on the lower end due to the unusually high demand for these types of premises, which is also why it's good to provide for them - but vacancies are not really going to be an issue for you providing you're a) in the heart of the precinct (not on the edges) and b) are not asking above market rates when it is time to find a new tenant. And whilst this may be a generalisation based on the strips in Adelaide I know - the capital gains are excellent. Whilst there are a few more petty annoyances than say industrial property - such as some maintenance etc - it's well worth it.
In my strip, it's extremely hard (virtually impossible) to find a vacant shop to lease in the core part of the strip. There's pretty much no such thing as vacancies - for the first time in 10yrs, there was actually a 'for lease' sign in a shop along the core strip. It only lasted a month (who knows perhaps less if I knew the details) and had multiple people interested. Generally you don't even know a shop is becoming vacant, the first you know of it is when the store closes down and the new tenant puts a 'coming soon' sign up. Many premises have a key purchase negotiated between the old and new tenants.
Anyway, good on ya mate, still hoping I'll be able to buy the building I'm in one day....