If by 10-12USD Bluetooth Adapter you mean the USB adapters that are commonly used to give PC's Bluetooth capability. Its highly unlikely that you'll see a PIC BASIC solution that uses those. You'd have to impliment a large part of the Bluetooth stack in the PIC, using PBP AND have USB Host capability available in the same device. So it's no possible.
To qualify that, Technically its just about possible to impliment something, but it would most likely not be compliant with any standard and there'd bo no code space left for the payload - your application!
What you need is a 10USD (1 off price) Bluetooth module with AT command set and to my knowledge they don't exist at present.
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