I saw that 3 gallons of peanut oil at Lowes was $37. Vegetable oil must be less expensive.
Anyway, everyone says you're supposed to use peanut oil for the taste and for the higher smoke point. Smoke point aside, have you tried an oil other than peanut and how did it taste?
While I'm on the topic, how long will a tank of propane last? If I get 3 people together, that's probably 4-5 hours of burn time needed which includes time between turkeys to heat up the oil to fry temperature.