Got o Northern or harbor freight and get a tire mounter. It cost me abotu $45. It take some manual labor but isnt hard. And you need to hard mount it on the ground with concrete bolts. OR get some long tire spoons and a high lift jack. Remove air from tires, put bottom end of high lift on tire side close to the rim, and put the lift part fo the jack under a car/jeep/truck and raise it. The weight of the vehicle will break the bed, then use the tire spoons to remove tire. Unless you find somebody that has the tools, you will have to spend a little money and quite frankly it will end up being almost as much as it is to have them unmounted.