Get a set-up from a really good tech, shouldn't be very expensive, worth every penny.
But if you are going to do it yourself (like I do):
-Remove strings, set truss rod dead flat (need luthier knotched straight-edge for PRS scale lengths)
-Use small straight edge (teeter-totter method) to check for high frets (my PRS came with 4 high frets)
-Check all frets for wear
-Do fret level if needed for high frets, followed by crown and polish on any fret you level, and any fret that needs dressed
-Put 1/4 turn counterclockwise on truss rod (my technique) to obtain slight relief (forebow)
-Install strings, set action to taste, and check every string on every fret for buzz.
-If you still have issues, maybe change your string gauge, pickup height. I have an ES-335 that had NO sustain with heavier strings (14s), but I changed to 10s, and now get all the sustain I want, and great tone too
There are some tools you would need for all of this that I didn't mention--long fret sander, 800/1000/1500/2000 grit sandpaper, crown file.
One-time purchase of these costs about the same as 1 setup, and then you can do all the setups you want.
Part of being an electric guitar player is being able to do your own setup and maintenance. Part of the fun too. That's my opinion. I would do anything my guitars require except a fret replacement job. But that's me.