If you're looking to do something cheap, I'd look at Craigslist for a good rack from Yakima, Thule, Saris, etc. I found a Thule 2-bike rack that works just fine with my Class-A hitch (it also had adapters for 2") for about $100. They didn't have the key for the bolt, so they gave it to me for $50. Bought a new bolt/lock for $35. So far it's held up great.