Hydroponics

I have a dozen or so 4 liter empty plastic water bottles.  I would like to begin dabbling with hydroponics by using them.  I would like to plant tomatoes, strawberries and maybe cucumbers (4 of each).  I think they have similar requirements in terms of nutrients in the water, ph, etc. Can someone recommend a particular system to set up using them?  I would like it to be a central system rather than attending to each pot individually so that I have the experience of maintaining a water pump, air pump, etc.  Any ideas?

4 liters seems a little on the small size for tomatoes, but google "dutch bucket system"

If you haven't already, check out the series on garden bucket hydroponics by Cody's Lab on YouTube.

Here's the playlist