I have pulled a trailer with 3 different bikes, from a bone-stock (performance-wise) '99 FLHR to a '03 FLTR with a Stage II big bore kit. My trailer is esencially a Modified economy priced hardware store trailer with a car-top carrier bolted to it. I use a KromeWerks trailer hitch. It will slow your acceleration down a bit, and drop your MPG a bit, but the most important thing to consider is increased braking distance. You also have to remember you're a bit wider than usual, but not by much.
I'll bet you paid more than $250 though! :lero