I am very tight lipped about using your own aircraft to do initial training. Yes, you could have a great deal by purchasing a nice 150 and then break even or even save a lot of money by selling it once you get all your ratings. However, aircraft unfortunately do break and they cost a lot for maintenance, hanger, insurance, and the list goes on. I know several people in my FBO who own their airplanes and I could say that if you fly at least 100 a year you will break even, but if not you are wasting your money. Also, my suggestion is that you get your PPL by renting and then look at ownership. Again just my .2