Why not just but a RaspberryPi Zero-W for $10US from Adafruit
and use it as a USB Host to WiFi bridge?
1) power and integration, given the goal of a BLE VNA sensor
2) toggling Pi Wi-Fi off/on between VNA scans could be problematic;
as would leaving it on.
3) "(BLE support is still in the works, software-wise)"
Oristo