Do a hydro vegetable garden as a trial. I used a large folgers container with a 5 inch airstone and air pump to do some tomatoes and so far I like it. I even tried perlite as the medium, but won't again even though its working. This way you don't waste any good MJ seeds, and you can do it in a window of your house, so you don't take up precious grow room real estate.
I don't have a pH pen, or TDS meter, just liquid pH testing. It is a little time consuming to get the water right, but if you have a good pH stable nutrient (I use dyna gro, very stable) then the maintenance between rez changes is minimal or null. If I had a pH pen, it would save me half the time I bet. But all in all I like it. Hopefully I can put a MJ plant in DWC soon enough.