Yea i just went with the first place was $700 but no it not bolted into spare wheel well, does have a bolt to hold straight or something but main frame goes up and to the sides and into the chassis. Towbar it's self is rated to 3000kg, however they said 1000kg because of running gear, example power of motor and manual you could easily burn out the clutch, or even break something in driveline. The rating would go up for a auto, i'd say 2500kg would be about max tho.
I've towed a good size boat with mine about 1700kg i think on a 3hr drive, was a little hard to get moving at first but cruised fine on open road. Didn't use my car to put into and out of water tho. Got 350kms outta the tank for interests sake 10km more than around town driving
Towing capacity with brakes (kg) 1200 (means the trailer / caravan has brakes)
Towing capacity without brakes (kg) 570