Lets separate fact from fiction. A top of the line tow dolly equiped with surge brakes and LED lights can be had for about $1800. There is a simple conversion connecter that converts your RV connecter to a flat 4 pin and it comes with the dolly or buy one for less than ten dollars. And it does not require two people to drive on or off the dolly unless you are an insecure, nervous or incompentent driver. The hardest part of the tow dolly is attaching or detaching the straps. My Master Tow Dolly was about $1800 complete. A really good 4 down system complete with a brake controller and installation often costs more than a tow dolly. An elderly person with a bad back or knees should go with 4 down. Many vehicles require additional drive shaft, oil pump or electrical modifications that can add to the expense. None of them are cheap. I drive on or off the ramps in a couple minutes by myself and it is easy. Doing the straps takes 5 to 10 minutes with a little practice. A tow dolly is great if you own more than one front wheel drive car (I do). Either a dolly or 4 down tow easy. The dolly has more flexibilty as it can tow a variety of cars without modifications. Depending on the vehicle to be towed, 4 down can require anywhere from a few to a lot of modifications. Your best price for a new tow dolly is buying direct, not thru CW or other dealers who mark up the price a lot. For most folks the easiest thing is to buy a car that can be towed 4 down with the fewest modifications. You probably don't want to have to disconnect a drve shaft, etc. If you insist on towing a vehicle that is not suitable then consider a car hauler trailer. Exotic car owners prefer enclosed haulers. But now you are talking some real bucks. Big toys for big boys are not cheap!