This.That's a really good idea but you'd probably be able to pull more power if you used water.
Also, one small turbine spinning isn't shit in the way of power generation.
I'd say the best way to make money off of portal technology is in drug trafficking. Imagine the green in setting a portal from Colombia to bum-fuck nowhere USA.
i would definitely put a exit portal in a field somewhere. Then about 50 years later i put a entrance portal under my sink. Then i go back in time to meet myself and record it with a shitty phone camera.