The taurus is a little over 100$ to set up including the relay, switch, solenoid, and wiring required to run one reliably.
All electrics are inferior to mechanicals when it comes to moving air, but if you need to use an electric, the taurus is the more sensible way to go. Grab a few from the boneyard, and throw one in. keep the others for spares.
That said, I recommend staying with a mechanical clutch fan unless you absolutely cant.