Would changing the address and phone number be necessary?
My thinking is that Google is smart enough to correlate addresses and phone numbers to flag a new entry to be the same entity, thus carry over the reviews to the new one. (and you'd only be able to make a name change every 90 days, IIRC, so you won't get a second shot for some time).
It is definitely not a quick (within 24 hours) solution, as Google might go through some validation process.
In the US there are services (like UPS - presumably similar exist down under) that offer post boxes. Google flags the #123 box number, and does not accept P.O. box numbers, but I've designated the box as a Suite number (e.g. Ste 123, or, if it is a Suite already, Ste 999-123). I've not used this in Google (but did for offline purposes without issue from the vendor), so don't know if it works (G may correlate the street address as a service for boxes, anyway, IDK).
As for phone number - perhaps a cheap disposable phone?
You'll have to charge enough to your client to cover these costs, no doubt.
Also, the second G+ ID might need a slight twist to the name. For example, "McDonald's" (original to be renamed - e.g. to "Mickey D's"), and the second new account named "McDonald's - Restaurant" or "McDonald's - Darling Harbour".
Just offering up a suggestion here that might work, so, ideally, would like confirmation from someone in BHW on this.
If no one confirms, and you try this and it works, enter a [Method] and take credit for it.
