Scott: You can pull it with a F150, no farther than your going, flat ground, rural country, just take your time and make sure you have plenty of tongue weight. Stopping is the only real issue, make sure the trailer brakes work or keep a big following distance.
I use a F250 PSD to pull a 25' gooseneck with a
L5030 Cab, loaded R4 tires, loader, 2,000lb John Deere Aerator, 4,000 lbs of fertilizer, 2,500 lbs of seed, 175 lbs spreader and the trailer weighs 4,700 lbs empty. All of this in the mountains of West Virginia at a high rate of speed.
If your use to pulling big weight and paying attention to your defensive driving skills save your money and keep the truck you have now. If you were going to be putting alot of miles on the truck pulling that tractor then I would say different.
Engineers that design pickups always rate them for "worst case scenarios" and over design/under rate by a factor of two and sometimes three. They do that for the "short bus kids" that buy a pickup, put a load on it and then try to drive it like a car.
Spend that money saved on implements you need.