It's great that your GP is interested in acquiring a meter for his clinic. A few years ago, ProTime's manufacturers were offering meters to doctors for free, if they ran a certain number of tests each month - for a low volume clinic, it's probably better to buy a meter.
My preference, though, if you can afford it or if your medical plan will cover it, is to get your own meter. There's a feeling of empowerment that you get when you're able to test your own blood - even if the anticoagulant is managed by a clinician - that you don't have after driving to a clinic, waiting to get tested, and hoping the advice you get is correct.
I don't know how the Canadian medical system handles self-testing, but you may prefer to be able to take your life into your own hands to going to a clinic for testing. (If you were in the United States, you'll need a prescription to buy the meter and test supplies, in Canada it may be different.)