Since no replies I'll go ahead. If cost is your biggest hot button you should look at the Maximus tow loops. At about $300 I believe they come in under a Blue Ox base plate. I used the Mopar flat tow wire harness, Maximus tow loops, and ReadyBrute tow bar. Of course if you already have a tow bar you likely already have clevis's on the bar for a (Blue Ox) base plate? If that's the case it might be better to just stay with BO. If you used the tow loops you will need the clevis's specific to them.
One of the best places to check components needed for flat towing is Etrailer.
Get what you are comfortable installing yourself.
They have several different base plates, wiring harnesses, etc. Etrailer
Best of luck...