The cord on my TT is 35 feet long. I have 2 - 50 foot 30 amp cords. That's a total of 135 feet of cord with 30 amp draws more times than not. Never a problem running anything inside the camper. Run the air conditioner and microwave at home (and campgrounds) all the time.
Rather than getting one 75 foot cord, get two 50 foot cords. It give you more versatility.
I purchased new 50 foot cords a year ago. They run approximately $2.00 a foot. Do the math, and you'll come pretty close to the price on any RV cord.
