possible flaws in my drain to waste, drip coco setup?

[medmanmilan]

I'm currently planning my next grow, and I just thought of a great idea, since my plants will be in my basement and the whole place is sloped so water gets channeled into a drain outside, what if I omitted a tray, and simply lined them all up on the floor! (its concrete, obviously)
this would be a serious advantage for me as its pretty roomy down there, but I only have 6 feet of height to work with, so the fact that I'd have the plants sitting in a tray thats up on some blocks, well that gives me quite a bit more room! (not to mention not shelling out another $100 for a tray), what do you guys think?

 

[Greenthumbnewb]

you could always rig some pvc connected to the pump in your resi to water them, so they could sit on the floor and drain to waist but u could have a system to water them...ive done this before worked great and no trays..