Three quarter sleeve idea

I've been thinking for the better part of a decade about a three quarter sleeve. Some basic questions I could use help with.

Without going into too much detail, the way I'm picturing it, it's a black and grey pointillism and line art piece that uses the 2D/3D effect that old Disney animations had, in order to create some layering.

Questions:

\- How many sessions would something like this take?

\- What cost should I be expecting if it were a three quarter sleeve at most or half sleeve at least?

\- Any recos for good pointillism/line art artists in or around the Boston area (I'm South Shore).

\- Any watch outs with these types of pieces as the ink settles over time or just in general when vetting artists?