Keep replacing parts

Thank you so much for responding. Lets see on the Landrover in the past two months I replaced the starter, alternator and the hose for the antifreeze because it was leaking(looked like it was cut)and the radiator and then after all that it kept overheating and leaking from somewhere that noboday could figure out! Then I went out and bought a 2003 Hyundai Elantra thinking that it would be cheaper to fix if I ever needed to. Mechanic said it was fine, two days later, I spent $528.00 for an alternator, then after that, two days later it started leaking water and it seems like it running badly. It seems im getting stuck on the side of the road, like every day. And it's so bad that AAA has stopped me from using anymore tows. Could this be someone doing this to me? But how could they if they couldnt get under my hood. Thanks.