What do I need to spend coming from an all-vinyl setup?

There's plenty of digital stuff out there, but I would not sell my turntable until you know you're satisfied with your digital setup. Maybe cull down your record collection but bad digital can be a real turnoff and then you stop listening.  Not knocking digital, but you really need to find a setup that satisfies you.  

Hello, the OP plans on downsizing, so building up the turntable is not an option. 

As much as you desre.

bluesound node 2i $400 used

cullen cable digital cable 1.5m $100
mhdt stockholm 2 or istanbul $800-1200 used or new
we 2c51 tube to replace stock 5670 in mhdt $100

or

metrum amethyst $800 used

or

ayre codex $900 used (substitute lifatec 1.5 m glass toslink cable for cullen)

*****************************************************

lovely analog-like dimensional sound

make sure you have good high speed ethernet or wifi
smartphone or tablet to run blu os controller app
tidal master and/or quboz hifi subscription

@dhcod 
I know how you feel. I was always a vinyl person until a few years ago, but circumstances changed and I now find myself embracing the benefits that digital music provides.
Unlimited music for one low monthly fee is hard to argue with. I will always keep a few hundred records and a turntable, but for me it will just be another option.