Will this watering method work/be sanitary?

[BrassavolaStars]

Hello all,

I just finished my GH project of putting a floor in. It now looks great and drains well. I would post a picture but there are plants all over as I had to rush them in before I could place them nicely on the shelves.

I wanted to take this opportunity to change the way I water. I used to use plastic saucers to keep the water from dripping but I no longer want to do that as spilling them out was time-consuming and invariably they dripped anyway.

I would like to put a tray under all the plants, punch a hole in the tray and, and then grade the tray so the wastewater runs towards the hole. I would have the hole hooked up to a flexible plastic tube that takes the water away to the drain area so no water drips on the plants below.

Will this work? Is it sanitary enough? I thought I would raise the plants slightly above the tray using rocks or styrofoam so the water from one plant isn't rushing from one pot past the bottom of the others. I will attach a poorly drawn illustration for clarity's sake.

Tell me if this will be sanitary enough.