They aint cheap. Most anything flyable and aint facing soon overhaul will probably start around $35,000 bottom and up. All but the very simplest maintenance has to be done and/or blessed by a A&P and they have the license to charge. Engine overhauls start above 20K, and recommended TBO overhauls are about 2,000 hours on the popular 150 HP engines.
My first plane, a Piper Tri Pacer was $5,000 in 1976. Today on that airplane in the same shape it was would be close to 10X that. Last year I sold my Citabria for 45 K, I paid $5,800 for it back in 1977 but when I sold it, it was restored like new. It is a small two seater. The same airplane is still made and a new one is over 200K!! Av gas is running about $5.50 a gallon and the smaller planes burn like 8 gallons a hour. I don't know what 2 seat trainer planes rent for now, but I suspect they start around $120 a hour and the instructors probably get $30?? Ground school usually costs too however I have went for free + books here at our local college but that's unusual. I don't think they offer it for free anymore. Then there is the cost of the mandatory annual, and they aint cheap even if the plane hasn`t been flown that year
Now as far as those reality shows go, I don't think you can believe much. I always get a charge watching the guys playing primitive. Where do you think that camera crew is staying nights and eating? Awhile back one slow afternoon my wife and I were eating at the local Chilli`s. A guy met his girl friend there. He had come to watch himself on one of those reality shows I think was put on by National Geographic. The four of us watched it together. It was about these three guys riding horses and living off the land with blackpowder rifles traveling the northwest towards the Grand Tetons. I worked a season for the park service in the Tetons back in 1961 so it was interesting. I asked him how he got on the show and he said "They found me." I surmise he was a local guide or whatever.
I was watching one where this guy lives in a shack in the middle of nowhere but owns a Piper Cub that must cost a 100G. It showed him flying way back in to shoot a Elk and he must do this to survive the winter! The cost of flying that plane to do it would cost him more as as a sure thing of buying a freezer full of prime beef! Course that wouldn't be as much fun.