Many years ago, when we were full-timing in a fifth wheel, I got a Dodge Ram 3500 CTD dually to tow it. At that time, the Husky fifth wheel hitch was on sale for a little over $400 (IIRC). I got one of them, followed the installation instructions very carefully, and it took me about a day to install it, including the in-bed 7 pin receptacle. Yes, I''m slow, but that's what happens when you measure three times before drilling a hole!
I used that hitch for several years, completely trouble free.
I don't know if the Husky hitch is still available, or if it is still made by Valley Industries, but if it is I highly recommend it.
A google search for "husky hitch" shows the Husky 16K hitch for between $300 and $600 at etrailer.com
Whatever hitch you get, do not use grease on the plate. Get the plastic disc to replace the lube grease. It is MUCH cleaner!