what a mess, hopefully they got glass shards in their skin somewhere..... I have full glass coverage with my insurance, doesn't cost much and with all the gravel that gets flung up on the highways is the way to go. *** also whether or not you have insurance for glass, car window repair services will often come right to your vehicle even if you are parked at work (as long as they have clear access and the keys)
about ebb and flood systems, we have three types at work, though one the water isn't re-collected it just goes into the sewer system after going under the boardwalk between houses. one type has a huge tank, water gets pumped into a house and into pipes along walls, a valve pops two solenoids so water gets released into the floor pipe and prevented from draining. water comes up onto floor, then at preset time, the solenoid releases the drain and another shuts off the inflow at the same time. works well where the floor is the same depth all around so the same amount gets into the pots and none go dry. water gets pumped back up into big tank after going through a debris filter. another type has large tank, gets pumped up into a rolling bench; solenoid releases and closes inflow and water goes back out the hoses it came in from. the last one water goes from inflo lines, into a main line along benches, then several trunk lines go up to the benches that have 6" shallow gutters on top, slight declination away from front to back, with just enough slope so some water builds up as it flows past pots, goes into pots and then the rest runs off gutter eventually to the drain. it could be collected and filtered if so designed.
I was thinking about setting up a system for my few phrags and maybe some disas (some day), have a common 24" or so hydroponics tank maybe 5" or so wide, has two holes on one end with elbows. figured I could use an aquarium pump that can adjust inflow so that just enough water goes in the tank so that water level rises about an inch or so before draining out back into the tank. could either adjust the inflow coming in, or tweak drainage so that the water level raises to where needed before draining out, just set a timer for when you want the water to run and for how long.
the ebb and flow benches at work were designed to grow african violets, and had wicking fabric on plastic racks (about 1/2" high) above bottom of bench, ends sitting in the water, pots sitting on fabric so that pots would get moist but not be sitting in the circulating water. since bench might not be the same level all around the rack and fabric was best way to water everything as equally as possible.
I know you're looking for a design that has already been used for orchids so that you can determine the results from their design, but this should give you a good idea about different types of systems and how you might arrange something in your home.
good luck!