I had my cage done by a friend who owed me a favor and it cost me $1000 and he welded the seat brackets in for me as well. So good lick with getting it for under $1000. if it was me I wouldnt go for a bolt in cage, its the main safty feature after the brakes and I dont mind paying extra if its going to save my legs let alone my life, get as many bars in the car as you can afford and forget the bolt in option in two years time they'll be banned and you'll be faced with the same costs all over again.