Towing hubs only bolt to rear axles, not to the fronts, so that is out. Using tow dollies, like wreckers use, are too wide for trailer, so that's out too. Some sort of a "skid" an entire car can be loaded onto, and winched up onto the trailer, but when you're by yourself, that's out. So, a good sized winch, and just pull the car onto the trailer is it. If these cars look anything like the Porche in your avitar, your really not going to damage them much. It will need to be a tilt trailer, not one with ramps. OR, flatbed tows can be done as cheap as $60.00 where I live; how many tows would it take to add up to the price of a trailer, winch, tow vehicle, and a few tools to go along with the job? It's a matter of economics, and unless you do a LOT of this, it's really not worth the outlay. JMO. Butch/56sedandelivery.