Installing huge tv with drywall lifter ?

"I’ll tell you my latest dumb idea that might actually be genius.. I have electric motorized desks (rated for 300lbs). Position the desk against the wall so it catches the bottom of the tv.. Lift up and have wife hold tv up (no weight just don’t let it fall)."

a true genius would realize there are so many ways that can go wrong, I am against the idea, not saying I’m a genius, but when both the TV and the desk are damaged, not to mention the wall and/or floor, and perhaps you or your wife is injured, you ain’t gonna feel like one then.

here’s another idea, buy a bigger TV, and a mount and include installation, there are lots of sales, then sell the 85 or use it elsewhere.

Or, wait, they get lots of returns after Christmas, get a great deal, INSTALLED!

They also get a lot of returns after Super Bowl if that patient!

And soon after, people are expecting tax return money, so more people might buy your 85

This won’t help the OP’s dilemma, but it may provide a solution to anybody buying a wall mount TV in the future. When I bought a new TV for my den, I bought the Samsung "Frame" model.  When you aren’t watching TV, the screen shows artwork that you can choose from -- famous works from the Masters, current artists, genres, etc.  The image can stay on one piece of art, or rotate based on the time you set.  It looks like an actual painting on your wall.  But the neat thing is, there is a control box that you plug all the HDMI cables into and just one small cable that goes from the control box to the TV.  The cable is smaller than a single old timey speaker wire and I believe it is 15’ or 20 feet long.  You can hide the Control Box and either paint the wire or run the wire so it’s hidden.  Accessing my HDMI connections has never been easier.

A thought:

Even though these T.V.’s have gotten tons cheaper through the years, the nicer, larger ones are still a pretty penny.

If you simply got a friend or found a couple of guys willing to do it, what happens if they screw up and accidentally break it? It’s not like they’re gonna say "sorry" and buy you a new T.V. I’d seek out professional installers who guarantee against things like that. More expensive? Sure, if nothing goes wrong. But a heck of a lot cheaper than having to buy another T.V. Now, given what you need it may sound like overkill, but there's a reason they're called 'accidents'.

It’s hard to tell without seeing how the tv is currently positioned and where the HDMI ports are- but would that be possible to try some kind of pliers to insert that cable? Something like this link, 13 inch long.

I’m able to do that on my tv, but I also can reach those tv inputs by hand as our tv was installed with that in mind.

https://www.harborfreight.com/13-in-long-reach-compound-joint-pliers-64108.html?hftm_sc=318&hftm_source=google