(The show is fake. Most of their "finds" are rented from local collectors and staged in a location to be "found". They put out flyers and social media calls for months before going to a town. They know exactly where they are going to be going and what they will "find" before ever setting foot.)
And yes, without the TV show money they would go broke if they were actually just randomly driving all over the country trying to buy other peoples junk. Hotels average $100 a night and you can spend that much again pretty quick for fuel in a giant moving van like theirs. play with a calculator a little bit, hotel every night, gas every day, eating out every day for 3 meals a day. doing this "for real" at 300 days a year gets REAL expensive.