Installing huge tv with drywall lifter ?

Thank you all for the replies. I agree, calling a friend is best. But I echo what one guy said up top, my friends are getting tired of helping me. I also agree with preplanning etc. But that's not always feasable with someone who likes to upgrade/change often.

Also, I don't need a lift from the floor, I just wanted the drywall lift to grab it on the wall, lift it a couple inches off the rails and hold it there for a second.  

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). 

If I decide to try this, i'll be sure to video for you all.

My brother destroyed a Sony Bravia 85 inch OLED TV 3 years ago.  He just got it and tried hoisting it up by himself.  Somehow it slipped out of his hands and smashed on the hardwood floor.  Guess what?  Sony wouldn't think of covering it.  Homeowners wouldn't cover it, he was screwed.  Eventually, Sony gave him something like $500.00 off another set which he bought factory direct.  The panel was bowed on the new TV, sent it back and got another.  No problems now but a very expensive lesson was learned at a huge loss and expense.

You might think of adding some blocking behind the support rails now, the TV could ’float’ off the wall, leave enough room to get your arm in behind.

Or, change to a telescoping/pivoting rack, normally use it pushed all the way in, flat against the wall, but pull it out and pivot for access to jacks.

When you attach to these universal type racks, you just get the weight on it, then you put a safety bolt somewhere so it cannot be removed by error.

https://www.amazon.com/monTEK-Extension-Bracket-Articulating-Profile/dp/B0FKTBVW1V/ref=sxin_17_pa_sp_search_thematic-asin_sspa?cv_ct_cx=tv%2Bwall%2Bmount&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=1-3-f7d8a1b7-d68f-4a86-bfcb-111c62272989-spons&aref=4aTJvLNZul&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWM

It is a whole lot easier to pull the mount out from the wall, put the TV on it while there is room for you to get your head/shoulder/arm/tool behind, see/position, safety fasten, then push it in. 

and, you can now tilt a bit or a lot to deal with any unwanted reflections.

....................................

the hdmi switch idea,

if you have a single hdmi cable connected, from anything, and cannot reach the TV end, leave it, disconnect it from it’s source component, that will become the ’out’ from the hdmi switch into the current hdmi in, now hook up ____ to the switch, no need to get to any jacks on the back of the TV

IF it can sense which input, great, or, get one with a remote control, but, that might need power like I mentioned before, a wall wart or usb-c adapter.

"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