You are on the correct path in not taking yours and your family's safety lightly, My first TT ride many years ago was with the cheapest WDH the dealer had and it was white knuckled all the way home, from personal experience do NOT go cheap on the WDH and brake controller for the sake of your blood pressure and safety. I use an Equalizer 4 point sway and a Prodigy 3 brake controller and feel safe pulling my rig. There are others that are probably just as good but again you will be in the $500 range for a quality hitch and around $120 for a good brake controller.
Be safe and Happy Camping!