*laugh*...
OK, go for it...I really look forward to your awesome videos, seriously. I wish you much success.
Ever wonder why they show head stack swaps only on Seagate drives in the videos? They don't have the nasty little T6 screw on the headstack unlike almost all other brands, that's why. Removing that on a multi-platter drive is indeed an exercise in masochism. Of course, once you get the platters out of the way, it's piece of cake. Oops, there goes $500 in equipment.
I would have bought live drives that are still working but are too old to be useful. It's more fun to kill them and revive them. You can also start growing your firmware collection.
By the way, start learning foreign languages. A lot of information on reverse engineering HDDs is available in Russian and Chinese. I know Russian and I am learning 3 other languages.
Once you realize how arcane this stuff really gets (get used to hex code) and start investing thousands of dollars into specialized equipment, you'll probably find yourself rethinking just how much of this you really want to share with your customers. After all, you'll probably want to earn a nice return on your investment.
We have a reason for doom and gloom. What do amateurs recommend? Chkdsk, testdisk, spinrite, hdd regenerator, "run a diagnostic". I say let the manufacturers run the diagnostic after you do a warranty exchange. It's obvious that the drive is dead, why torture it with diagnostics and tools not designed to work with dead drives?
All of the tools mentioned above have the uncanny ability to kill drives. No one ever bothers to warn the reader about the risks involved. No one checks if the user hears the symptoms of a head crash.
I posted a detailed procedure on how to get a nearly ideal sector-level copy of any drive on one amateur forum. It's pretty detailed and should handle most cases of mild drive corruption when the drive is still recognized by BIOS. I did it because I was astonished at the kind of bad advice was given to people.
I am pretty sure they are about to ban me because I disclosed all the risks of their favorite shortcuts and introduced the concept of doing it safely. "No one has two extra drives lying around, this is bad advice!". Well, if it saves someone a trip to my office, with the minimum fee exceeding the cost of even the fanciest external drives, I am sure they can splurge and get a couple of new drives. Apparently, suggesting to swap a controller board on a dead drive that shows no signs of life after a power surge is against the rules *laugh*. Their advice? "Give up, this is too hard". What's hard about removing 5 screws with a T8 driver, assuming I tell them which board they need and whether it needs any soldering. Oh yeah, knowing that it's possible.
Sure, it saves a drive when someone can simply run testdisk and rebuild the MFT, but to do _that_ on a live drive with no sector-level backup?! I wouldn't be comfortable doing that if someone actually explained to me what are the risks. Suppose the miracle cure does work, the drive is still failing. It'll die again in a week. Or, it doesn't, and we start hearing the all too familiar "click click click..."
Or... my all-time favorite great advice. Boot into recovery console and run CHKDSK /R. That is probably the fastest way to turn a drive that can be imaged into a jumbled mess of clusters. Yep, the drive will boot...maybe... but the data will be uhh... what's that expression... clusterf-----

That is why the doom and gloom. Try to explain to someone an imaging procedure of a failing drive when they are clueless what is the difference between HD and RAM. They'll be tempted to try a magic shortcut. That's one way to increase the fee they'll have to pay to someone like me. Someone was pretty fired up about doing a platter swap on a Samsung triple-platter 500GB drive even though his issue was obviously to me not going to be resolved by that. It's obviously a firmware problem. Those I prefer to fix professionally. Did I mention that he wanted to save on platter transfer tools? It took some convincing to talk him out of that nonsense.
It doesn't take a God, but it does take someone with enough computer expertise to understand how file systems and partition tables really work. Most people know Windows and how to click. If this is easy for you, it's really great.
Normal progression looks like this:
Student -> user -> hell desk -> admin -> consultant -> server expert -> server recovery expert -> hdd recovery expert.
Or...

hacker -> consultant -> hdd recovery expert
Unless you know lots of hackers, you'll find the number of people truly qualified to be quite slim. You do know that Scott's videos were produced at a hackers' convention, right?