I have a very jaded view of all of those shows.
They are 99% done for entertainment with no real basis in reality.
I came to this conclusion 20 or so years ago when the shop I was at had ESPN come and do an episode of "On the Block"
It was based on purchasing a "Barn Find" and getting it running and prettied up for auction at Barrett Jackson.
The "Barn Find" was a 69/70 Impala or some such.
This car was taken to a barn, had dirt thrown on it, air let out of the tires ect to make it look like it had been parked for years.
It then came into the shop where they set up a camera to take one picture every 10 min while I pulled the engine and "refreshed" it.
Once that was done, it went to the detail dept where it was "brought back to life" on paint, interior.
Then they showed the car going to Barrett Jackson for auction.
The whole timeline was 2 weeks.
In fact, it took 8 months to get that car done. The engine, a big block, had problems that needed a machine shop to correct.
Meanwhile, interior pieces and exterior chrome trim had to be sourced ect.
2 weeks my ass.
The whole show was a farce.
The guy at Barrett Jackson who "won" the highest bid, a month later filed a lawsuit against the shop I worked at because the car was misrepresented.
The A/C did not work, and on and on.
They ended up giving the guy his money back and taking the car back and "fixing it right".
So, yeah, not much of a fan of those type of shows ever since.
If you watch closely, you can see the deception if you know what to look for.