I’m not in on Sunday, but great if you can help set that up - I’m one of those people interested in that! AFAIK, the washroom area at the end of the messy room doesn’t yet have running water or plumbing, and the drain in the sink might just spill onto the floor. In the meantime, as a Number 8 wire solution, something might be rigged up like a gravity fed IV drip, using a large plastic milk container or the like and some tubing and bulldog clip to clamp the tube - adjust the flow using shims. It just needs a dribble or constant drip. There are some light stands and a mic stand in the sofa area if there’s no other way of mounting the feed bottle (please keep them clean). A roller brush paint tray or similar is good to work on and to collect the water. The stonework I’ve done has been with larger pieces, so I’m not sure what’s best for holding something like that or what’s available in the space that’s suitable for clamping. There’s a large heavy vice which could perhaps be used (?). I think you may be best clamping the tool with a set up a bit like the one shown below, but I think Joe or someone should check the setup for safety. I’d recommend getting proficient with soft stone before trying much harder stone. Alabaster is great to work with, can cut and carve very easily (but don’t mix with water). Marble offcuts would be best (and can be free). For cutting, I’ve found diamond wire is best if doing it by hand. I used to use handles, but now I prefer holding it with cut proof gloves. Otherwise there are diamond rotary saw blades, angle grinders etc. With the rotary tool, make sure speed is suited to the kind of stone and type of work and bit. In case it’s of any interest, stone can also be etched using the laser cutter/engraver.
Joe, how about if using the rotary tool with a long flexi-shaft? - tool motor unit mounted up and away from water, motor unit can even be in a plastic splashproof enclosure. Water is really just a dribble. It won’t get onto the electrical parts.