How much is the car worth that you are towing?
How much is your house and all possessions worth?
Multiply by 100 and that is the amount somebody will sue you for if you screw up doing it.
Yes I have been flat towed with a chain, and have pulled somebody over 2 hrs thru the mountains using one, if the tow vehicle driver and the towed vehicle driver do not know what they are doing bad things can happen fast.
