How much do you need to spend to get digital to rival analog?

You are correct.  The room acoustics and power quality are paramount to maximizing the abilities of the electronics/speakers.  That's why I spent more on my room construction than on my audio equipment and it paid off.  See near the bottom of Page 2 of  https://forum.audiogon.com/discussions/the-5-stages-of-making-a-bad-audio-purchase?lastpage=true&page=3 my post for my detailed room construction details

Thanks Fleschler for the interesting link...

Not only conventional room treatment is paramount for sound quality, but the treatment of the electrical grid of the house and of the room, and some others unconventional treatment are paramount too for me : Schuman generators modified, Helmholtz resonators (homemade one), and other resonators of my own design (cheap homemade but with astounding results)…

Upgrading an amplifier or a dac, if you had already a good one or even speakers, before implementing these controls methods is for me throwing money without even knowing the real optimal sound of the audio system you already owns before upgrading it...Most audiophile change gear some months apart without addressing any of the fundamentals relatively cheap methods to improve in a stellar way their already very good audio system...

Beside that comparing digital sound and analog one in the abstract, or in a very particular system with a particular files or vinyl in a very particular room in a very particular house is for me without any value for anyone...Except for boasting about your taste or system... Basic problems first...I apologize for my rant and wish the best to all...

Room acoustics are extremely important but that avoids the question. Given the same room and system how much do you have to spend on digital to equal the performance of a $3K turntable. I do not know if that includes the cartridge and tonearm but say it does which means it is not a very high end table. It would be one of intermediate performance. You could probably beat it with a $2K computer and usb interface. That does not include the DAC but the turntable does not include the phono amp. 

Exactly! Assume the same room. I guess we should assume attention is given to isolation, RFI/EMI, too. It’s difficult or maybe impossible to have a level playing field.

I do not evade the question.... My point is about fundamentals to an audiophile experience....And give me the money + these fundamentals implemented in a room I will give you the best of digital or analog "relatively" equal in quality almost on par with each other...Because in a " particular system" the answer will be yes or no relatively to many factors, not only the gear price, but many other factors...People dont understand that the problem cannot be solved in the " same room"  because "this same room"  is only "a particular room" … In another room the answer will be another answer.... It is basic …:) The digital sound and the vinyl sound dont exist by itself in the blue sky of audio idealities with a value attached to them....They exist implemented and manifest to some ears in a particular environment with a particular audio system...

My point is that money only cannot solve the question once and for all, at least a reasonable amount of money by itself cannot resolve the question once and for all, without taking account of the room grid, house grid, audio electrical grid and mechanical vibrations grid, etc... And the ears factor :)