Here I have a Thule Euroride 3 bike carrier which attaches to a tow bar of any type. The hitch mechanism can be locked with a key for theft protection.
It has UK standard 7 pin electrical connector. You can load up to 45kg worth of bikes with 20 kg limit for a single bike (most modern bikes are under 15 kg). The carrier itself is around 16kg. So you need to make sure your car can take the combined load of your bikes and the carrier on the tow bar.
I've used the rack on a VW Golf with 65 kg tow bar limit and suppose most cars of similar size would accept such load. Mounting the rack on a car can be a one man job as the attachment process is quite simple and the weight or the rack is about manageable. When loaded with bikes you can still access your boot by tilting the rack with the bikes on. This is a very handy feature which I used all the time. It's a simple one man operation and does not require any particular strength.All lights are working and the carrier is in perfect mechanical order. There are some scuffs on the paint where bike pedals have touched the frame and where occasionally loaded rack have touched the ground when parking off road.
Please see pictures for details. The rack is a couple of years old and spent most of this time in the garage folded. Collection only from Cambridge CB3. The item "Thule 943 Euroride 3 Bike Carrier TowBar Mounted Tilting Cycle Rack" is in sale since Wednesday, May 04, 2016.
This item is in the category "Vehicle Parts & Accessories\Car Accessories\Touring & Travel\Bike Racks". The seller is "reservisor" and is located in Cambridge, Cambridgeshire. This item can't be shipped, the buyer must pick up the item.